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Goodwill and Intangibles (Schedule of Intangibles) (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]          
Acquisition cost $ 96,721   $ 96,721   $ 56,495
Accumulated amortization (20,039)   (20,039)   (17,235)
Net 76,682   76,682   39,260
Amortization of Intangible Assets 1,646 $ 807 3,039 $ 1,533  
Finite-Lived Intangible Assets, Net 76,682   76,682   39,260
Customer Lists [Member]          
Finite-Lived Intangible Assets [Line Items]          
Acquisition cost 56,239   56,239   27,476
Accumulated amortization (10,737)   (10,737)   (9,138)
Net 45,502   45,502   18,338
Finite-Lived Intangible Assets, Net 45,502   45,502   18,338
Tradenames [Member]          
Finite-Lived Intangible Assets [Line Items]          
Acquisition cost 23,302   23,302   18,116
Accumulated amortization (5,059)   (5,059)   (4,558)
Net 18,243   18,243   13,558
Finite-Lived Intangible Assets, Net 18,243   18,243   13,558
Technology [Member]          
Finite-Lived Intangible Assets [Line Items]          
Acquisition cost 17,139   17,139   10,862
Accumulated amortization (4,202)   (4,202)   (3,498)
Net 12,937   12,937   7,364
Finite-Lived Intangible Assets, Net 12,937   12,937   7,364
Other [Member]          
Finite-Lived Intangible Assets [Line Items]          
Acquisition cost 41   41   41
Accumulated amortization $ (41)   $ (41)   $ (41)