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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Effective rate	45.50%	67.30%	48.80%	52.10%
Income tax expense	$ 10,120	$ 7,505	$ 18,062	$ 17,105
Federal statutory rate	35.00%	35.00%	35.00%	35.00%
Income tax expense	$ 59		$ 1,098
Pre-tax federal net operating losses	$ 3,671		$ 3,671
Pre-tax federal net operating losses expiration date			2024
Tax effected NOLs - Foreign			$ 2,821

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Deferred tax assets, operating loss carryforwards, net of tax.

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Income tax expense associated with stock compensation shortfalls.

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Operating loss carry forward expiration year.

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