Consolidated Statements of Income and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Discontinued operation tax effect of discontinued operation	$ 0	$ 20,578	$ 106,396
Foreign currency translation adjustment, income tax benefit (expense)	1,066	(78)	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	(91)	861	(248)
Amortization of losses and gains from pension and postretirement benefit plans, income tax (expense) benefit	$ (470)	$ (35,852)	$ (27,786)