Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Narrative) (Details)

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Acquisitions (Narrative) (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Jan. 02, 2015
Jun. 30, 2015
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Business Acquisition [Line Items]              
Revenues     $ 296,748,000 $ 220,753,000 $ 575,571,000 $ 432,571,000  
Net income     (2,477,000) $ 2,923,000 (6,049,000) $ 7,187,000  
Goodwill   $ 125,655,000 125,655,000   125,655,000   $ 115,238,000
Securities Service Network, Inc. (SSN)              
Business Acquisition [Line Items]              
Purchase price $ 47,287,000       $ 25,000,000    
Goodwill, deductible period for income tax purposes         15 years    
Revenues     28,678,000   $ 57,590,000    
Net income     (18,000)   618,000    
Cash paid in acquisition         16,919,000    
Identifiable intangible assets 30,901,000            
Goodwill 8,798,000            
Securities Service Network, Inc. (SSN) | Promissory Notes | 0.41% Promissory Notes              
Business Acquisition [Line Items]              
Notes payable - long term $ 25,000,000            
Interest rate, stated percentage 0.41%            
Securities Service Network, Inc. (SSN) | Promissory Notes | 1.74% Promissory Notes              
Business Acquisition [Line Items]              
Notes payable - long term $ 20,000,000            
Interest rate, stated percentage 1.74%            
Debt instrument, term 4 years            
Periodic payment $ 18,697,000            
Imputed interest rate 5.10%            
Amount to be paid in excess of net worth of promissory notes $ 3,590            
KMS Financial Services, Inc. and Securities Service Network, Inc. (SSN)              
Business Acquisition [Line Items]              
Non-recurring income tax benefit eliminated from the pro forma results         21,238,000    
Dalton              
Business Acquisition [Line Items]              
Purchase price   2,689,000          
Cash paid in acquisition   2,100,000     2,100,000    
Contingent consideration, liability   589,000 589,000   589,000    
Identifiable intangible assets   2,675,000 2,675,000   2,675,000    
Goodwill   $ 14,000 $ 14,000   $ 14,000