Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets- Intangible Assets (Details)

v3.7.0.1
Goodwill and Intangible Assets- Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]          
Proceeds from sale of assets of a business     $ 2,777 $ 0  
Goodwill, written off related to sale of business     2,639    
Gross Carrying Amount $ 25,692   25,692   $ 25,707
Accumulated Amortization 22,579   22,579   21,776
Intangible assets, net 3,113   3,113   3,931
Amortization of intangible assets     716 1,211  
Customer contracts          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 7,702   7,702   7,594
Accumulated Amortization 7,687   7,687   7,566
Amortization of intangible assets 8 $ 48 15 94  
Customer relationships          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 11,686   11,686   11,652
Accumulated Amortization 8,807   8,807   8,048
Non-compete agreements          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 3,026   3,026   3,203
Accumulated Amortization 3,002   3,002   3,158
Technology          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 2,734   2,734   2,716
Accumulated Amortization 2,563   2,563   2,485
Trade names          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 544   544   542
Accumulated Amortization 520   520   $ 519
Customer Relationships, Noncompete Agreements, Technology and Trade Names          
Finite-Lived Intangible Assets [Line Items]          
Amortization of intangible assets $ 328 $ 559 $ 701 $ 1,117  
Minimum          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     1 year    
Minimum | Customer contracts          
Finite-Lived Intangible Assets [Line Items]          
Acquired intangible assets useful life     1 year    
Minimum | Other intangible assets          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     4 years    
Maximum          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     15 years    
Maximum | Customer contracts          
Finite-Lived Intangible Assets [Line Items]          
Acquired intangible assets useful life     5 years    
Maximum | Other intangible assets          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life     15 years