Summary of Significant Accounting Policies (Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets
Gross carrying amount	$ 84,957	$ 83,277
Accumulated amortization	27,609	21,605
Technologies
Finite-Lived Intangible Assets
Gross carrying amount	47,157	47,157
Accumulated amortization	16,104	13,244
Non-compete agreements
Finite-Lived Intangible Assets
Gross carrying amount	2,062	2,022
Accumulated amortization	1,455	1,243
Licenses
Finite-Lived Intangible Assets
Gross carrying amount	650	650
Accumulated amortization	441	424
Customer lists
Finite-Lived Intangible Assets
Gross carrying amount	4,923	3,423
Accumulated amortization	1,327	1,053
Customer relationships
Finite-Lived Intangible Assets
Gross carrying amount	20,690	20,700
Accumulated amortization	5,494	3,575
Trade names
Finite-Lived Intangible Assets
Gross carrying amount	9,475	9,325
Accumulated amortization	$ 2,788	$ 2,066