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REGULATORY MATTERS, COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2013 | Feb. 16, 2011 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |  |  |
Cash dividends declared on preferred stock |  |  | $ 2,676 | $ 223 | $ 0
Proceeds from sale of available-for-sale securities |  |  | $ 23,408 | $ 219,780 | $ 0
Loans acquired on exchange of loan held for sale |  | $ 136,100 |  |  |
Common Equity Tier 1 Capital Conservation Buffer First Year |  |  | 0.625% |  |
Banking Organizations Basel Advanced Approach Asset Requirement |  |  | $ 250,000,000 |  |
Foreign Subsidiaries Basel Advanced Approach Asset Requirement |  |  | $ 10,000,000 |  |
Basel III [Member] |  |  |  |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |  |  |
Capital Conservation Buffer | 2.50% |  |  |  |
Common Equity Tier 1 Capital To Risk Weight Assets Ratio | 4.50% |  |  |  |
Common equity tier 1 capital to risk weight assets ratio plus common equity tier1 capital conservation buffer | 7.00% |  |  |  |
Total Tier 1 Capital To Risk Weight Assets Ratio | 6.00% |  |  |  |
Total Tier 1 Capital To Risk Weight Assets Ratio Plus Common Equity Tier 1 Capital Conservation Buffer | 8.50% |  |  |  |
Total Tier 1 Capital And Tier 2 Capital To Risk Weight Assets Ratio Plus Common Equity Tier 1 Capital Conservation Buffer | 10.50% |  |  |  |
Leverage Ratio | 4.00% |  |  |  |
Total Tier1 Capital And Tier 2 Capital To Risk Weight Assets Ratio | 8.00% |  |  |  |
Cpg Gs [Member] |  |  |  |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |  |  |
Cash realized on sale of loan |  | $ 88,500 |  |  |

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- Definition Basel advanced approach rules apply to banking organizations with more than $250 billion in assets + References No definition available. + Details
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- Definition The percentage by which the company's Common Equity Tier 1 Risk Based Capital must exceeds the minimum required for no restrictions in the first year of transition period under Basel III rule. + References No definition available. + Details
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- Definition Common Equity Tier 1 capital divided by risk weighted assets as defined by new Basel III rule. + References No definition available. + Details
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- Definition Minimun common equity tier 1 capital to risk weight assets for capital adequacy purposes plus capital conservation buffer as required by Basel III rule. + References No definition available. + Details
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- Definition In order to avoid limitations on capital distributions and certain discretionary bonus payments, banking organizations will be requiered to hold a specific amount of excess of their minimum risk-based capital ratios. + References No definition available. + Details
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- Definition Foreign banking with more than $10 billion in assets are required to use the Basel advanced approaches + References No definition available. + Details
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- Definition Minimum Tier 1 capital to average assets for capital adequacy purposes as required by Basel III rule. + References No definition available. + Details
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- Definition Loans acquired on exchange of loan held for sale. + References No definition available. + Details
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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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