Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000811532 (http://www.sec.gov/CIK)

Debt Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Long-term debt as of December 31, 2016 and December 31, 2015 consisted of the following:     December 31, 2016   December 31, 2015 (In thousands)         Revolving credit facility (due 2018)   $ —   $ — Term debt (1)         March 2013 U.S. term loan averaging 3.25% (due 2013-2020)   602,850   608,850 Notes         June 2014 U.S. fixed rate note at 5.375% (due 2024)   450,000   450,000 March 2013 U.S. fixed rate note at 5.25% (due 2021)   500,000   500,000     1,552,850   1,558,850 Less current portion   2,775   2,475     1,550,075   1,556,375 Less debt issuance costs   15,864   19,699     $ 1,534,211   $ 1,536,676 (1) These average interest rates do not reflect the effect of interest rate swap agreements entered into on variable-rate term debt (see Note 6 to the Consolidated Financial Statements).
Schedule of Maturities of Long-term Debt	At December 31, 2016, the scheduled annual maturities of term debt were as follows: (In thousands) 2017   2018   2019   2020   2021   2022 & Beyond   Total U.S. term loan maturing in 2020 $ 2,775   $ 6,300   $ 6,300   $ 587,475   $ —   $ —   $ 602,850