CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash dividends, common stock (in dollars per share)	$ 0.18	$ 0.17
Stock dividends, restricted stock units (in dollars per share)	$ 0.18	$ 0.17
Return of equity trust shares	28,648
Pulaski
Stock dividends, accrued restricted stock awards (in dollars per share)	$ 0.18