Annual report pursuant to Section 13 and 15(d)

Income Taxes - Unrecognized Tax Benefits (Details)

v3.8.0.1
Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Disclosure [Abstract]      
Income tax interest and penalties $ 6,100 $ 1,400 $ 1,000
Reconciliation of Unrecognized Tax Benefits [Roll Forward]      
Balance at beginning of year 4,637 4,237 2,831
Additions from business combinations 3,492 0 0
Increase to prior year positions (34) 0 0
Reversal of prior tax positions (147) 0 (1,795)
Additions based on tax positions related to current year 3,100 400 3,201
Balance at end of year $ 11,048 $ 4,637 $ 4,237