Goodwill and Intangible Assets (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 57,106	$ 61,236
Accumulated Amortization	20,849	17,506
Net Carrying Amount	36,257	43,730
Trademarks and patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,071	1,075
Accumulated Amortization	356	303
Net Carrying Amount	715	772
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	35,124	37,825
Accumulated Amortization	15,487	13,340
Net Carrying Amount	19,637	24,485
Covenant not-to-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,051	1,056
Accumulated Amortization	794	628
Net Carrying Amount	257	428
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	19,860	21,280
Accumulated Amortization	4,212	3,235
Net Carrying Amount	$ 15,648	$ 18,045