Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Finite-lived Intangible Assets, Gross [Roll Forward]
Intangible assets, January 1	$ 34,362	$ 7,602
Additions	0	0
Total intangible assets, end of period	34,362	7,602
Accumulated amortization, January 1
Accumulated amortization, January 1	(11,933)	(7,515)
Current year amortization	(1,822)	(28)
Total accumulated amortization	(13,755)	(7,543)
Net intangible assets, end of period	$ 20,607	$ 59