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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Schedule of Loans and Leases Receivable (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014 | Mar. 31, 2015 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 4,473,095 | $ 3,949,122 |  | $ 2,602,213 |  |
Allowance for loan and lease losses | (34,787) | (29,480) | $ (29,345) | (22,627) | $ (20,003) | $ (18,805)
Loans and leases receivable, net | $ 4,438,308 | $ 3,919,642 |  |  |  |
Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Concentration risk percentage | 100.00% | 100.00% |  |  |  |
Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 771,477 | $ 490,900 |  | 368,540 |  |
Allowance for loan and lease losses | (6,884) | (6,910) | (6,484) | (3,007) | (2,367) | (1,822)
Commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 807,146 | 999,857 |  | 535,744 |  |
Allowance for loan and lease losses | (4,445) | (3,840) | (3,904) | (5,615) | (6,449) | (5,484)
Multi-family |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 696,768 | 955,683 |  | 234,179 |  |
Allowance for loan and lease losses | (3,680) | (7,179) | (7,164) | (3,408) | (2,720) | (2,566)
SBA |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 56,887 | 36,155 |  | 28,684 |  |
Allowance for loan and lease losses | (674) | (335) | (566) | (261) | (211) | (235)
Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 32,022 | 42,198 |  | 30,761 |  |
Allowance for loan and lease losses | (579) | (846) | (695) | (1,245) | (352) | (244)
Lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 131,189 | 85,749 |  | 57,754 |  |
Allowance for loan and lease losses | (1,646) | (873) | $ (1,195) | $ (730) | $ (622) | $ (428)
Single family residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,723,043 | 1,048,485 |  |  |  |
Consumer Home Equity Loan | Green Loans (HELOC) - first liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 117,881 | 123,177 |  |  |  |
Consumer Home Equity Loan | Green Loans (HELOC) - second liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 4,773 | 4,979 |  |  |  |
Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 131,909 | 161,939 |  |  |  |
Purchased Credit Impaired |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 266,372 | $ 246,897 |  |  |  |
Purchased Credit Impaired | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Concentration risk percentage | 6.00% | 6.30% |  |  |  |
Purchased Credit Impaired | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 365 | $ 1,134 |  |  |  |
Purchased Credit Impaired | Commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 11,004 | 11,527 |  |  |  |
Purchased Credit Impaired | Multi-family |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Purchased Credit Impaired | SBA |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 3,021 | 3,157 |  |  |  |
Purchased Credit Impaired | Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Purchased Credit Impaired | Lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Purchased Credit Impaired | Single family residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 251,982 | 231,079 |  |  |  |
Purchased Credit Impaired | Consumer Home Equity Loan | Green Loans (HELOC) - first liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Purchased Credit Impaired | Consumer Home Equity Loan | Green Loans (HELOC) - second liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Purchased Credit Impaired | Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Non-Traditional Mortgages (NTM) |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 720,321 | $ 350,575 |  |  |  |
Non-Traditional Mortgages (NTM) | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Concentration risk percentage | 16.10% | 8.90% |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - first liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 715,435 | $ 345,483 |  |  |  |
Non-Traditional Mortgages (NTM) | Green Loans (HELOC) - second liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 4,886 | 5,092 |  |  |  |
Non-Traditional Mortgages (NTM) | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Non-Traditional Mortgages (NTM) | Commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Non-Traditional Mortgages (NTM) | Multi-family |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Non-Traditional Mortgages (NTM) | SBA |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Non-Traditional Mortgages (NTM) | Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Non-Traditional Mortgages (NTM) | Lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Non-Traditional Mortgages (NTM) | Single family residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 597,554 | 222,306 |  |  |  |
Non-Traditional Mortgages (NTM) | Consumer Home Equity Loan | Green Loans (HELOC) - first liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 117,881 | 123,177 |  |  |  |
Non-Traditional Mortgages (NTM) | Consumer Home Equity Loan | Green Loans (HELOC) - second liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 4,773 | 4,979 |  |  |  |
Non-Traditional Mortgages (NTM) | Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 113 | 113 |  |  |  |
Traditional Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 3,486,402 | $ 3,351,650 |  |  |  |
Traditional Loans | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Concentration risk percentage | 77.90% | 84.80% |  |  |  |
Traditional Loans | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 771,112 | $ 489,766 |  |  |  |
Traditional Loans | Commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 796,142 | 988,330 |  |  |  |
Traditional Loans | Multi-family |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 696,768 | 955,683 |  |  |  |
Traditional Loans | SBA |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 53,866 | 32,998 |  |  |  |
Traditional Loans | Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 32,022 | 42,198 |  |  |  |
Traditional Loans | Lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 131,189 | 85,749 |  |  |  |
Traditional Loans | Single family residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 873,507 | 595,100 |  |  |  |
Traditional Loans | Consumer Home Equity Loan | Green Loans (HELOC) - first liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Traditional Loans | Consumer Home Equity Loan | Green Loans (HELOC) - second liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 0 | 0 |  |  |  |
Traditional Loans | Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 131,796 | 161,826 |  |  |  |
Total NTM and Traditional Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 4,206,723 | $ 3,702,225 |  |  |  |
Total NTM and Traditional Loans | Loan Portfolio | Loan Portfolio Concentration Risk |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Concentration risk percentage | 94.00% | 93.70% |  |  |  |
Total NTM and Traditional Loans | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 771,112 | $ 489,766 |  |  |  |
Total NTM and Traditional Loans | Commercial real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 796,142 | 988,330 |  |  |  |
Total NTM and Traditional Loans | Multi-family |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 696,768 | 955,683 |  |  |  |
Total NTM and Traditional Loans | SBA |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 53,866 | 32,998 |  |  |  |
Total NTM and Traditional Loans | Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 32,022 | 42,198 |  |  |  |
Total NTM and Traditional Loans | Lease financing |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 131,189 | 85,749 |  |  |  |
Total NTM and Traditional Loans | Single family residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 1,471,061 | 817,406 |  |  |  |
Total NTM and Traditional Loans | Consumer Home Equity Loan | Green Loans (HELOC) - first liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 117,881 | 123,177 |  |  |  |
Total NTM and Traditional Loans | Consumer Home Equity Loan | Green Loans (HELOC) - second liens |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | 4,773 | 4,979 |  |  |  |
Total NTM and Traditional Loans | Other consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Gross loans | $ 131,909 | $ 161,939 |  |  |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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