CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Stockholders' Equity [Abstract]
Cash dividends, per share (in dollars per share)	$ 0.28	$ 0.20	$ 0.13
Unrealized gain (loss) on foreign exchange contracts, tax	$ 14	$ 31	$ 61
Unrealized gain (loss) on interest rate swap contracts, tax	444	136	422
Change in pension and post retirement benefit plans, tax	$ 10,279	$ 5,887	$ 8,188