Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]
Dividends on preferred stock (in dollars per share)	$ 16.25	$ 16.25
Dividends on common stock (in dollars per share)	$ 0.04	$ 0.04
Sale of treasury stock (in shares)	2,710	471,680
Restricted stock grants, shares	685,872	26,232
Forfeitures of restricted stock, shares	3,390	41,404