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Summary of Operating Loss Carryforwards (Detail) $ in Thousands	Dec. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	$ 0
State Operating Loss Carryforwards	71,303
Foreign Operating Loss Carryforwards	7,142
2018
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	9,943
2019
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	174
2020
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	130
2021
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	2,919
2022
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	6,362
2023-2027
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	12,296
2028-2032
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	34,963
Beyond 2032
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
State Operating Loss Carryforwards	4,516
Foreign Operating Loss Carryforwards	130
Non-Expiring
Operating Loss Carryforwards [Line Items]
U.S. Federal Operating Loss Carryforwards	0
Foreign Operating Loss Carryforwards	$ 7,012

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319

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