Goodwill and Intangible Assets - Goodwill Roll Forward (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2010
Goodwill [Roll Forward]
Beginning balance, January 1	$ 33,798	$ 33,798	$ 33,798
Additions	0	0
Ending balance	$ 33,798		$ 33,798