Summary of Significant Accounting Policies (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets
Gross carrying amount	$ 69,706	$ 40,606
Accumulated amortization	11,355	6,926
Technologies
Finite-Lived Intangible Assets
Gross carrying amount	43,828	31,928
Accumulated amortization	7,609	5,150
Non-compete agreement
Finite-Lived Intangible Assets
Gross carrying amount	1,932	1,932
Accumulated amortization	862	675
Licenses
Finite-Lived Intangible Assets
Gross carrying amount	650	650
Accumulated amortization	390	373
Trademarks
Finite-Lived Intangible Assets
Gross carrying amount	150	150
Accumulated amortization	150	145
Customer list
Finite-Lived Intangible Assets
Gross carrying amount	3,423	3,423
Accumulated amortization	483	291
Customer Relationships
Finite-Lived Intangible Assets
Gross carrying amount	11,500	0
Accumulated amortization	1,054	0
Trade name
Finite-Lived Intangible Assets
Gross carrying amount	8,223	2,523
Accumulated amortization	$ 807	$ 292