Acquisition Preliminary Purchase Price Allocation (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	$ 48,570	$ 48,570	$ 48,570
Goodwill	53,799	53,799	53,593
Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	4,100	4,100	4,100
Order or Production Backlog [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross	$ 7,900	$ 7,900	$ 7,900