Goodwill and Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 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	(3,644)	(56)
Total accumulated amortization	(15,577)	(7,571)
Net intangible assets, end of period	$ 18,785	$ 31