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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of contractual obligation, five years [Table Text Block]

The annual minimum payments for the next five years and total minimum payments thereafter are presented below:

Years Ending December 31,		Amount (in thousands)
2018		$	113,774
2019		112,860
2020		111,107
2021		102,606
2022		72,073
Thereafter		62,245
Total		$	574,665

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- References

No definition available.

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- Definition

Tabular disclosure of the aggregate amount of payments due on known contractual obligations for the five years following the date of the latest balance sheet and the combined aggregate amount of maturities of known contractual obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 303
-Paragraph a
-Subparagraph 5

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