Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2012	Nov. 30, 2011
Debt Instrument [Line Items]
Total debt	$ 1,065,472	$ 833,879
Less: Current maturities of long-term debt	(31,676)	0
Less: Deferred financing costs	(3,591)	(3,325)
Long-term debt, net of deferred financing costs	1,030,205	830,554
Term Credit Agreement borrowings due 2024 at a variable interest rate of 2.3% at December 31, 2016
Debt Instrument [Line Items]
Total debt	$ 350,000	170,000
Variable interest rate	2.30%
Senior Notes due 2022 at a fixed interest rate of 3.75%
Debt Instrument [Line Items]
Total debt	$ 325,000	325,000
Fixed interest rate	3.75%		3.75%
Incremental Term Loan Agreement borrowings due 2026 at a variable interest rate of 2.5% at December 31, 2016
Debt Instrument [Line Items]
Total debt	$ 300,000	0
Variable interest rate	2.50%
Mortgage notes due 2017 at fixed interest rates of 4.35%
Debt Instrument [Line Items]
Total debt	$ 31,676	42,638
Fixed interest rate	4.35%			4.35%
Revolving Credit Facility borrowings due 2020 at a variable interest rate of 1.9% at December 31, 2016
Debt Instrument [Line Items]
Total debt	$ 25,000	97,000
Variable interest rate	1.90%
Solid waste bonds due 2020 at a variable interest rate of 2.0% at December 31, 2016
Debt Instrument [Line Items]
Total debt	$ 15,000	15,000
Variable interest rate	2.00%
New Zealand JV noncontrolling interest shareholder loan at 0% interest rate
Debt Instrument [Line Items]
Total debt	$ 18,796	23,242
Fixed interest rate	0.00%
New Zealand JV Revolving Credit Facility due 2016 at a variable interest rate of 3.54% at December 31, 2015
Debt Instrument [Line Items]
Total debt	$ 0	$ 160,999
Variable interest rate		3.54%