Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 200,000	$ 0	$ 0
Amortization expense for 2017	1,500,000
Amortization expense for 2018	1,500,000
Amortization expense for 2019	1,500,000
Amortization expense for 2020	1,500,000
Amortization expense for 2021	$ 1,500,000