Supplemental Cash Flow Information Interest and Taxes Paid(Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]
Interest, net	$ 59,564	$ 43,076	$ 57,206
Income taxes	$ 44,807	$ 36,179	$ 14,522