Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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)	2,004,212	2,099,865
RETAINED EARNINGS:
Dividends paid on common stock, per share	$ 0.68	$ 0.68	$ 0.68
Dividends paid on preferred stock, per share	$ 63.76	$ 47.81
TREASURY STOCK:
Purchase of common stock, shares	(16,993,351)	1,284,373	566,584
Shares issued for restricted stock awards, shares	(672,634)	713,837	580,087