Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2012
Finite-lived Intangible Assets, Gross [Roll Forward]
Intangible assets, January 1	$ 7,602	$ 6,900
Additions	0	702
Total intangible assets, end of year	7,602
Accumulated Amortization [Roll Forward]
Accumulated amortization	(6,975)	(6,900)
Current year amortization	(430)	(75)
Total accumulated amortization	(7,405)
Net intangible assets, end of year	$ 197		$ 627