Stockholder's Equity (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Stockholders' Equity (Details) [Abstract]
Preferred Stock, Shares Outstanding	14,375,000	25,875,000	14,375,000	25,875,000	25,875,000	25,875,000
Preferred stock, shares redeemed			(11,500,000)	0
Preferred stock balance weighted average rate			6.50%	6.50%	6.50%	6.50%
Preferred stock balance redeemed weighted average rate			6.50%	0.00%
Preferred stock redemption charge	$ 0	$ 0	$ 9,769	$ 0