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Unamortized Stock-Based Compensation Expenses (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-Based Compensation | $ 1,357 | $ 1,485
Unamortized Stock-Based Compensation | 6,925 | 13,826
Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-Based Compensation | $ 776 | $ 688
Remaining Weighted Average Period (years) | 1 year 6 months | 2 years 4 months 24 days
Unamortized Stock-Based Compensation | $ 4,555 | $ 9,238
Unrestricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-Based Compensation | $ 123 | $ 96
Remaining Weighted Average Period (years) | 2 months 12 days | 2 months 12 days
Unamortized Stock-Based Compensation | $ 82 | $ 64
Performance Based Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Stock-Based Compensation | $ 458 | $ 701
Remaining Weighted Average Period (years) | 1 year 8 months 12 days | 2 years 4 months 24 days
Unamortized Stock-Based Compensation | $ 2,288 | $ 4,524

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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