Income Taxes - Activity related to the Company’s unrecognized tax benefits (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 1,078	$ 1,217		$ 5,767
Increases related to current year tax positions	496	0	0
Unrecognized Tax Benefits, Increases Resulting from Acquisition	0	236	0
Increases related to previous year tax positions	0	580	395
Reductions due to lapse of applicable statute of limitations	(48)	(256)	(4,945)
Reduction due to settlements	(22)	(699)	0
Balance at December 31	$ 1,504	$ 1,078	$ 1,217	$ 5,767