Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Dividends on preferred stock (in dollars per share)	$ 32.5	$ 32.5
Dividends on common stock (in dollars per share)	$ 0.08	$ 0.08
Sale of treasury stock (in shares)	5,519	475,182
Restricted stock grants, shares	685,872	426,552
Forfeitures of restricted stock, shares	71,580	50,294