Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Data (Unaudited) (Details)

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Quarterly Financial Data (Unaudited) (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Jul. 27, 2017
Jul. 27, 2016
Aug. 31, 2016
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jan. 06, 2017
Quarterly Financial Information Disclosure [Abstract]                              
Revenue       $ 159,598,000 $ 151,537,000 $ 155,742,000 $ 152,592,000 $ 156,764,000 $ 146,909,000 $ 112,265,000 $ 113,817,000 $ 619,469,000 $ 529,755,000 $ 426,030,000  
Operating expenses:       120,539,000 112,951,000 118,090,000 110,540,000 110,268,000 103,348,000 75,086,000 76,768,000 462,120,000 365,470,000 279,156,000  
Gross Profit       39,059,000 38,586,000 37,652,000 42,052,000 46,496,000 43,561,000 37,179,000 37,049,000 157,349,000 164,285,000 146,874,000  
Sales and marketing       10,565,000 9,332,000 10,029,000 11,012,000 11,388,000 8,390,000 6,491,000 4,672,000 40,938,000 30,941,000 17,705,000  
Product development       8,689,000 11,328,000 7,942,000 7,649,000 12,640,000 7,916,000 8,416,000 8,746,000 35,608,000 37,718,000 28,610,000  
General and administrative       38,842,000 39,129,000 34,929,000 35,321,000 32,800,000 44,728,000 18,447,000 19,220,000        
Provision for legal settlements       650,000 310,000 0 475,000 1,758,000 1,545,000 38,142,000 2,001,000        
Amortization of intangible assets       11,106,000 10,981,000 10,860,000 11,008,000 11,593,000 9,166,000 7,486,000 7,403,000 43,955,000 35,648,000 26,994,000  
Goodwill impairment       89,000,000 0 0 78,000,000 64,000,000 0 0 0 167,000,000 64,000,000 0  
Total operating expenses       158,852,000 71,080,000 63,760,000 143,465,000 134,179,000 71,745,000 78,982,000 42,042,000 437,157,000 326,948,000 155,685,000  
Loss from operations       (119,793,000) (32,494,000) (26,108,000) (101,413,000) (87,683,000) (28,184,000) (41,803,000) (4,993,000) (279,808,000) (162,663,000) (8,811,000)  
Interest expense, net       (14,519,000) (18,164,000) (14,807,000) (10,964,000) (10,369,000) (6,412,000) (613,000) (804,000) (58,454,000) (18,198,000) (2,492,000)  
Income from equity method investments       (16,334,000) 1,770,000 601,000 1,539,000 1,764,000 2,065,000 0 0 (12,424,000) 3,829,000 0  
Change in fair value of derivatives       839,000 196,000 (445,000) 2,920,000 7,533,000 1,191,000 10,926,000 5,865,000 3,510,000 25,515,000 11,938,000  
Other income (expense), net       (478,000) (123,000) 653,000 (488,000) (1,703,000) 631,000 (5,934,000) 680,000 (436,000) (6,326,000) (1,140,000)  
Income (loss) before income taxes       (150,285,000) (48,815,000) (40,106,000) (122,795,000) (90,458,000) (30,709,000) (37,424,000) 748,000 (362,001,000) (157,843,000) (505,000)  
Income tax expense (benefit)       (15,880,000) 4,153,000 4,024,000 2,816,000 1,256,000 (50,063,000) 736,000 3,160,000 (4,887,000) (44,911,000) 1,621,000  
Net income (loss)       $ (134,405,000) $ (52,968,000) $ (44,130,000) $ (125,611,000) $ (91,714,000) $ 19,354,000 $ (38,160,000) $ (2,412,000) $ (357,114,000) $ (112,932,000) $ (2,126,000)  
Net income (loss) per share - basic (in usd per share)       $ (1.51) $ (0.59) $ (0.52) $ (1.47) $ (1.07) $ 0.23 $ (0.49) $ (0.03) $ (4.07) $ (1.39) $ (0.03)  
Net income (loss) per share - diluted (in usd per share)       $ (1.51) $ (0.59) $ (0.52) $ (1.47) $ (1.07) $ 0.23 $ (0.49) $ (0.03) $ (4.07) $ (1.39) $ (0.18)  
Weighted average common shares outstanding - basic (in shares)       89,222,000 89,194,000 85,496,000 85,440,000 85,369,000 82,874,000 78,127,000 78,643,000 87,733,000 81,269,000 77,558,000  
Weighted average common shares outstanding - diluted (in shares)       89,222,000 89,194,000 85,496,000 85,440,000 85,369,000 85,081,000 78,127,000 78,643,000 87,733,000 81,269,000 78,394,000  
Business Acquisition [Line Items]                              
Increase (decrease) in deferred tax asset                       $ 42,124,000 $ (9,930,000) $ (19,060,000)  
Write-off of related party receivables                       $ 2,788,000 $ 2,624,000 797,000  
Repurchase and retirement of common stock (in shares)                   600,000   0 600,000    
Repurchase and retirement of common stock                   $ 5,200,000          
Repayment of EMC indebtedness                       $ (412,400,000)      
Loss on extinguishment of debt       $ 0 $ 0 $ 0 $ (14,389,000) $ 0 $ 0 0 $ 0 (14,389,000) $ 0 $ 0  
Other Income (Expense)                              
Business Acquisition [Line Items]                              
Write-off of related party receivables                   4,400,000          
Other Income (Expense) | Internally developed software                              
Business Acquisition [Line Items]                              
Impairment of intangible assets               $ 3,200,000   900,000          
Emerging Markets Communications LLC                              
Business Acquisition [Line Items]                              
Increase (decrease) in deferred tax asset   $ (53,900,000)                          
Deferred tax liabilities, foreign subsidiaries' contribution to pretax income   4,800,000                          
Deferred tax liabilities, withholding taxes   $ 2,700,000                          
Transaction and integration expenses                 $ 12,700,000 $ 1,900,000 $ 800,000   $ 15,400,000    
Shares issued 5,080,049                            
Shares issued (usd per share) $ 8.40                            
Repayment of EMC indebtedness                       $ (412,400,000)      
Emerging Markets Communications LLC | Common Stock                              
Business Acquisition [Line Items]                              
Shares issued   5,466,886                          
Common Stock                              
Business Acquisition [Line Items]                              
Repurchase and retirement of common stock (in shares)                         614,000    
UMG Recordings | Common Stock                              
Business Acquisition [Line Items]                              
Shares issued in period (in shares)     1,800,000                        
Line of Credit                              
Business Acquisition [Line Items]                              
Maximum borrowing capacity on line of credit                             $ 585,000,000
Loss on extinguishment of debt             $ (14,400,000)                
Secured Debt | Line of Credit                              
Business Acquisition [Line Items]                              
Maximum borrowing capacity on line of credit                             500,000,000
Revolving Credit Facility | Line of Credit                              
Business Acquisition [Line Items]                              
Maximum borrowing capacity on line of credit                             $ 85,000,000