Annual report pursuant to Section 13 and 15(d)

Supplemental Cash Flow Information (Supplemental Disclosure Of Cash Flow Information) (Details)

v3.3.1.900
Supplemental Cash Flow Information (Supplemental Disclosure Of Cash Flow Information) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Cash paid during the period for:      
Income tax payments $ 99,012 $ 87,787 $ 92,502
Income tax refunds (102) (482) (2,061)
Interest payments 13,087 6,142 5,230
Non-cash financing activities:      
Capital expenditures incurred but paid in advance 0 9,100 0
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) $ (1,620) $ (1,581) $ 1,296