Summary of Significant Accounting Policies (Inventories) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Obsolete Inventory Reserve
Balance at beginning of year	$ 2,880	$ 2,680	$ 2,775
Net additions charged to earnings	2,322	1,082	328
Disposals	(966)	(882)	(423)
Balance at end of year	$ 4,236	$ 2,880	$ 2,680