Long-Term Obligations - Long-term Obligations (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary of long-term obligations
Debt Obligations	$ 817,230	$ 735,230
Capital lease obligations and other debt	55,244	59,538
Total Debt and Capital Lease Obligations	872,474	794,768
Less - current portion	(33,623)	(19,356)
Current portion of long-term debt	838,851	775,412
Revolving line of credit [Member]
Summary of long-term obligations
Debt Obligations	$ 232,000	$ 135,000
Effective interest rate (percentage)	1.92%	1.67%
Senior Notes [Member]
Summary of long-term obligations
Debt Obligations	$ 585,000	$ 600,000
Effective interest rate (percentage)	1.92%	1.67%
Secured Seller Notes [Member]
Summary of long-term obligations
Debt Obligations	$ 230	$ 230
Stated interest rate (percentage)	10.00%	10.00%

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.

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section H

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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-Section 02
-Paragraph 22
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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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- Definition

Capital Debt Obligations and Other Borrowings

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