CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF EQUITY
Issuance of restricted shares of common stock	93,864	109,318	100,902
Issuance of shares of common stock upon exercise of stock options	87,378	43,034	303,536
Purchase of shares of common stock	37,567	34,293	163,222
Other comprehensive income before reclassifications, tax	$ 717	$ 641	$ 2,316