CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash dividends, common stock (in dollars per share)	$ 0.36	$ 0.34
Stock dividends, restricted stock units (in dollars per share)	$ 0.36	$ 0.34
Return of equity trust shares	28,648
Pulaski
Stock dividends, accrued restricted stock awards (in dollars per share)	$ 0.36