Consolidated Statement of Changes in Stockholders' Equity (Parenthetical)	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Preferred Stock (Par Value: $0.01):
Issuance of preferred stock, shares	515,000
Common Stock (Par Value: $0.01):
Shares issued for restricted stock awards, shares	1,366,969
Retained Earnings:
Dividends paid on common stock, per share | $ / shares	$ 0.17
Dividends paid on preferred stock, per share | $ / shares	$ 15.94
Treasury Stock:
Purchase of common stock, shares	126,483
Shares issued for restricted stock awards, shares	648,694