Stockholders' Equity (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2017
Stockholders' Equity
Dividends Payable, Date of Record	Jun. 30, 2017	Mar. 31, 2017
Series A Cumulative Redeemable Preferred Stock
Stockholders' Equity
Preferred stock dividend declared (per share)	$ 0.4531	$ 0.4531	$ 0.9062
Common Stock
Stockholders' Equity
Common Stock dividend declared (per share)	$ 0.90	$ 0.80	$ 1.70