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STOCK-BASED COMPENSATION - Restricted Stock - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Omnibus Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted shares of restricted stock |  |  |  | 407,886 |
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period |  |  |  | 11,000 |
Omnibus Plan [Member] | Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share based compensation cost | $ 0.8 | $ 1.0 |  | $ 2.7 | $ 3.0
Stock based compensation expense unrecognized related to nonvested shares of restricted stock | $ 2.9 |  |  | $ 2.9 |
Period for cost recognition not yet recognized |  |  |  | 1 year 4 months 24 days |
Omnibus Plan [Member] | Restricted Stock [Member] | Director [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted shares of restricted stock |  |  |  | 65,447 | 140,360
Restricted stock lapse, maximum |  |  |  | 1 year | 1 year
Omnibus Plan [Member] | Restricted Stock [Member] | Management [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted shares of restricted stock |  |  |  | 342,439 | 951,332
Restricted stock lapse, maximum |  |  |  |  | 2 years
Retirement Eligible Shares |  |  |  | 20,447 |
Omnibus Plan [Member] | Restricted Stock [Member] | Restricted stock vesting after two years [Member] | Management [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted stock vesting percentage |  |  |  | 50.00% |
Omnibus Plan [Member] | Restricted Stock [Member] | Restricted stock vesting after three years [Member] | Management [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted stock vesting percentage |  |  |  | 50.00% |
Troubled Asset Relief Program [Member] | Restricted Stock [Member] | Senior Officers [Member] | Government [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted shares of restricted stock |  |  | 838,332 |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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