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Share-Based Payments - Summary of Grants, Exchanges and Forfeitures of Restricted Stock and RSUs (Detail) - LTIP [Member] $ in Thousands | 9 Months Ended
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Sep. 30, 2016 USD ($) shares
Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Outstanding, beginning of period (in shares) | 340,064
Outstanding, end of period (in shares) | 357,120
RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Outstanding, beginning of period (in shares) | 1,242,810
Outstanding, end of period (in shares) | 897,550
January 2016 [Member] | RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Cancelled upon delivery (in shares) | (318,160)
Forfeiture (in shares) | (1,667)
February 2016 [Member] | RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Grant (in shares) | 47,028
Estimated Fair Value on Grant Date | $ | $ 729
March 2016 [Member] | RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Grant (in shares) | 5,095
Estimated Fair Value on Grant Date | $ | $ 81
April 2016 [Member] | Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Grant (in shares) | 17,056
Estimated Fair Value on Grant Date | $ | $ 275
June 2016 [Member] | RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Forfeiture (in shares) | (14,972)
July 2016 [Member] | Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Cancelled upon delivery (in shares) | 0
July 2016 [Member] | RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Cancelled upon delivery (in shares) | (543)
Forfeiture (in shares) | (12,792)
Grant (in shares) | 1,528
Estimated Fair Value on Grant Date | $ | $ 25
August 2016 [Member] | RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Forfeiture (in shares) | (15,642)
September 2016 [Member] | RSUs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
Cancelled upon delivery (in shares) | (41,281)
Grant (in shares) | 6,146
Estimated Fair Value on Grant Date | $ | $ 101

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Canceled Upon Delivery + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Aggregate Grant Date Fair Value + References No definition available. + Details
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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 grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(1) -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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