Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Stockholders' Equity [Abstract]
Dividends on preferred stock (in dollars per share)	$ 48.75	$ 48.75
Dividends on common stock (in dollars per share)	$ 0.12	$ 0.12
Sale of treasury stock (in shares)	479,751	459,836
Restricted stock grants, shares	429,752	429,346
Forfeitures of restricted stock, shares	63,716	23,590