Capitalization - Class D Preferred Stock Issuance (Details) - Class D Preferred Stock - USD ($)		12 Months Ended
	Sep. 03, 2015	Dec. 31, 2015
Capitalization
Shares issued (in shares)		3,093,092
Preferred Stock
Capitalization
Shares issued (in shares)	3,093,092
Share price (in dollars per share)	$ 21.01
Cash proceeds	$ 64,787,549