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Stock Compensation Plans - Time-Based Restricted Stock Activity (Detail) - Time Based Restricted Stock [Member] - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Schedule Of Share Based Compensation Restricted Stock Units Award Activity [Line Items] |  |
Shares outstanding beginning balance | 414 |
Shares vested | (121) |
Shares awarded | 30 |
Shares forfeited | (47) |
Shares outstanding ending balance | 276 | 414
Weighted average remaining term (Years) beginning balance | 1 year 11 months 19 days | 2 years 11 months 16 days
Aggregate intrinsic value, Beginning balance | $ 6,926 |
Aggregate intrinsic value, Shares vested | 1,902 |
Aggregate intrinsic value, Shares awarded | 505 |
Aggregate intrinsic value, Shares forfeited | 800 |
Aggregate intrinsic value, Ending balance | $ 3,767 | $ 6,926

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options. + References No definition available. + Details
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- Definition Schedule Of Share Based Compensation Restricted Stock Units Award Activity [Line Items] + References No definition available. + Details
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- Definition Share Based Compensation Arrangement By Share Based payment award equity instruments other than options awarded in period. + References No definition available. + Details
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