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Debt and Financing Arrangements (Long term Debt) (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Other $ 32,065,000 $ 37,195,000
Debt issuance costs (6,820,000) 0
Total 323,053,000 362,879,000
Less: current maturities of debt 7,414,000 11,038,000
Long-term debt 315,639,000 351,841,000
Term loan | Term loan due 2024 ($299.3 million face value)    
Debt Instrument [Line Items]    
Term loan 297,808,000 0
Debt instrument, face amount 299,300,000.0  
Term loan | Term loan due 2021 ($325.7 million face value)    
Debt Instrument [Line Items]    
Term loan $ 0 325,684,000
Debt instrument, face amount   $ 325,700,000.0