Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	2,004,212	2,099,865	1,683,564
Issuance of preferred stock, shares	40,625,000
RETAINED EARNINGS (ACCUMULATED DEFICIT):
Dividends paid on common stock, per share	$ 0.68	$ 0.68	$ 1.00
Dividends paid on preferred stock, per share	$ 47.81
TREASURY STOCK:
Purchase of common stock, shares	1,284,373	566,584	448,223
Shares issued for restricted stock awards, shares	713,837	580,087	495,777