Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividend per common share (in dollars per share)	$ 0.34	$ 0.32
Options exercised in the period	0	0
Nonvested (restricted) shares granted	633,286	659,432
Restricted stock activity	(221,872)	(276,805)
Deferred compensation trust	(109,130)	(234,703)