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Debt (Schedule of Long-Term Debt) (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total debt	$ 396,252,000	$ 396,269,000
Unamortized debt premium	2,294,000	2,395,000
Debt issuance cost	(6,149,000)	(6,425,000)
Less: current maturities	(82,000)	(253,000)
Long-term debt	396,170,000	396,016,000
6.25% Senior Notes due October 2021
Debt Instrument [Line Items]
Total debt	400,000,000	400,000,000
Senior secured revolving credit facility
Debt Instrument [Line Items]
Total debt	0	0
Other debt
Debt Instrument [Line Items]
Total debt	$ 107,000	$ 299,000

X

- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Name Accounting Standards Codification
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-Section S99
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- Definition

The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

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-Name Accounting Standards Codification
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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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-Section H

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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