Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Changes in the carrying amount of goodwill
Balance at January 1, 2016		$ 256,736		$ 256,736
Goodwill Impairment	$ (29,560)	(85,900)	$ 0	(115,483)	$ 0
Sale of assets				(8,620)
Effect of foreign exchange rate changes				1,048
Balance at June 30, 2016	133,681			133,681
International
Changes in the carrying amount of goodwill
Balance at January 1, 2016		123,055		123,055
Goodwill Impairment				(115,483)
Sale of assets				(8,620)
Effect of foreign exchange rate changes				1,048
Balance at June 30, 2016	0			0
North America
Changes in the carrying amount of goodwill
Balance at January 1, 2016		$ 133,681		133,681
Goodwill Impairment				0
Sale of assets				0
Effect of foreign exchange rate changes				0
Balance at June 30, 2016	$ 133,681			$ 133,681