Goodwill and Intangible Assets - Schedule of Changes in the Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
Sep. 30, 2015 USD ($)
Goodwill [Roll Forward]
Goodwill gross, Beginning Balance	$ 163,755
Goodwill gross, Additions	1,086
Goodwill gross, Impairments	0
Goodwill gross, Ending Balance	164,841
Accumulated impairment losses, Beginning Balance	(38,240)
Accumulated impairment losses, Additions	0
Accumulated impairment losses, Impairments	0
Accumulated impairment losses, Ending Balance	(38,240)
Goodwill Net, Beginning balance	125,515
Goodwill Net, Additions	1,086
Goodwill Net, Impairments	0
Goodwill Net, Ending balance	$ 126,601

Goodwill accumulated additions.

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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- Definition

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

+ References

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Amount before 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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- Definition

Amount of accumulated impairment loss for an asset representing 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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- Definition

The amount of an adjustment to a previously reported goodwill impairment charge, which will be recognized in the subsequent reporting period.

+ References

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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

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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.

+ References

No definition available.

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