Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Finite-lived Intangible Assets, Gross [Roll Forward]
Intangible assets, January 1	$ 7,602	$ 7,602
Additions	0	0
Total intangible assets, end of period	7,602	7,602
Accumulated amortization
Accumulated amortization	(7,515)	(7,404)
Current year amortization	(56)	(56)
Total accumulated amortization	(7,571)	(7,460)
Net intangible assets, end of period	$ 31	$ 142