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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Mar. 31, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Income Taxes [Line Items] |  |  |  |  |  |
Effective tax rate | 29.30% |  | (2.00%) | 29.10% | 16.30% |
Gross unrecognized tax benefits excluding interest and penalties | $ 19,699 |  |  | $ 19,699 |  | $ 19,610
Net unrecognized tax benefit excluding interest and penalties that would impact effective tax rate | 11,714 |  |  | 11,714 |  |
Accrued interest on unrecognized tax benefits | $ 763 |  |  | $ 763 |  | $ 578
Income tax examination, description |  |  |  | The Company and its subsidiaries are subject to examination by federal, state and foreign tax authorities. The Internal Revenue Service commenced an examination of the Company's U.S. federal tax filings for tax years 2011 through 2013 during the quarter ended March 31, 2015 |  |
Unrecognized tax benefits related to various U.S. federal, state and foreign tax positions |  |  |  | $ 950 |  |
Earliest Tax Year [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Income tax examination period |  | 2011 |  |  |  |
Earliest Tax Year [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Open tax year |  | 2011 |  |  |  |
Latest Tax Year [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Income tax examination period |  | 2013 |  |  |  |

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- 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=6907707&loc=d3e32698-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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