Derivative Instruments (Details) - USD ($)
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Oct. 03, 2016 |
Sep. 30, 2016 |
Dec. 31, 2015 |
Apr. 30, 2015 |
| Subsequent Event [Member] | Senior Notes [Member] | 5.125% Senior Notes Due 2024 [Member] |
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| Derivative [Line Items] |
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| Aggregate principal amount |
$ 325,000,000
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| Interest rate |
5.125%
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| Subsequent Event [Member] | Line of Credit [Member] |
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| Derivative [Line Items] |
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| Debt repayments |
$ 138,438,000
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| Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] |
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| Derivative [Line Items] |
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| Interest rate swap, face amount |
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$ 100,000,000
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| Fixed rate on interest rate swap, percent |
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0.983%
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| Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Subsequent Event [Member] |
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| Derivative [Line Items] |
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| Interest rate swap, face amount |
$ 40,000,000
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| Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Long-time Liabilities [Member] |
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| Derivative [Line Items] |
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| Fair value of interest rate swap liability |
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$ (396,000)
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| Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member] |
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| Derivative [Line Items] |
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| Fair value of interest rate swap asset |
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$ 165,000
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