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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash provided by (used for) operations      
Net Income $ 38,254 $ 52,182 $ 80,009
Items in net income not using (providing) cash      
Depreciation and amortization, including deferred financing costs and other 74,927 57,197 53,052
Stock-based compensation 8,177 5,825 5,916
Pension expense 6,240 2,825 838
Deferred income taxes (7,823) 30,883 10,705
Change in fair value of interest rate swaps (4,210) 0 0
Other 491 (1,837) (1,589)
Loss on extinguishment of debt 14,304 0 0
Decrease (increase) in working capital, net of acquisitions      
Receivables (1,118) (18,182) (20,277)
Inventories (30,757) 9,604 (11,102)
Prepaid expenses and other (1,614) (985) 143
Accounts payable and accrued liabilities 45,651 6,822 15,418
Pension contributions (3,844) (54,257) (12,071)
Income taxes payable 6,385 (2,589) (7,766)
Other 6,844 (7,157) (11,433)
Net cash provided by operations 151,907 80,331 101,843
Cash provided by (used for) investment      
Expenditures for property and equipment (83,583) (87,526) (61,217)
Acquisitions of businesses and facilities (215,900) 0 0
Proceeds from sales of assets and other 644 3,134 4,813
Net cash used for investment (298,839) (84,392) (56,404)
Cash provided by (used for) financing      
Borrowings of long-term debt, including revolving credit facility 837,800 50,000 57,600
Payments of long-term debt, including revolving credit facility (754,071) 0 (57,600)
Treasury stock purchased (10,268) (23,711) 0
Financing costs (6,422) (702) (11)
Tax withholding payments for stock-based awards (383) (1,160) (392)
Other (242) 581 264
Net cash provided by (used for) financing 66,414 25,008 (139)
Net increase (decrease) in cash and cash equivalents (80,518) 20,947 45,300
Balance at beginning of the period 184,496 163,549 118,249
Balance at end of the period $ 103,978 $ 184,496 $ 163,549