Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-lived Intangible Assets, Gross [Roll Forward]
Intangible assets, January 1	$ 7,602	$ 7,602
Additions	26,760	0
Total intangible assets, end of year	34,362	7,602
Accumulated Amortization [Roll Forward]
Accumulated amortization	(7,515)	(7,405)
Current year amortization	(4,418)	(110)
Total accumulated amortization	(11,933)	(7,515)
Net intangible assets, end of year	$ 22,429	$ 87