Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets- Intangible Assets (Details)

v3.8.0.1
Goodwill and Intangible Assets- Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 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 $ 25,953   25,953   $ 25,707
Accumulated Amortization 23,152   23,152   21,776
Intangible assets, net 2,801   2,801   3,931
Amortization of intangible assets     1,082 1,793  
Customer contracts          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 7,777   7,777   7,594
Accumulated Amortization 7,769   7,769   7,566
Amortization of intangible assets 8 $ 46 23 140  
Customer relationships          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 11,830   11,830   11,652
Accumulated Amortization 9,216   9,216   8,048
Non-compete agreements          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 3,046   3,046   3,203
Accumulated Amortization 3,032   3,032   3,158
Technology          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 2,754   2,754   2,716
Accumulated Amortization 2,612   2,612   2,485
Trade names          
Finite-Lived Intangible Assets [Line Items]          
Gross Carrying Amount 546   546   542
Accumulated Amortization 523   523   $ 519
Customer Relationships, Noncompete Agreements, Technology and Trade Names          
Finite-Lived Intangible Assets [Line Items]          
Amortization of intangible assets $ 358 $ 536 $ 1,059 $ 1,653  
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