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Loans Receivable and Allowance for Credit Losses (Summary of Activities in Allowance for Loan Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Allowance for loan losses |  |
Beginning balance | $ 287,128 |
Ending balance | 297,654 | $ 263,094
Commercial lending | Commercial and industrial (“C&I”) |  |
Allowance for loan losses |  |
Beginning balance | 163,058 |
Ending balance | 169,695 |
Commercial lending | Commercial real estate (“CRE”) |  |
Allowance for loan losses |  |
Beginning balance | 41,237 |
Ending balance | 39,718 |
Commercial lending | Real estate loan | Multifamily |  |
Allowance for loan losses |  |
Beginning balance | 19,109 |
Ending balance | 18,499 |
Commercial lending | Construction and land |  |
Allowance for loan losses |  |
Beginning balance | 26,881 |
Ending balance | 32,220 |
Consumer lending | Real estate loan | Single-family |  |
Allowance for loan losses |  |
Beginning balance | 26,362 |
Ending balance | 25,957 |
Consumer lending | Home equity lines of credit (“HELOCs”) |  |
Allowance for loan losses |  |
Beginning balance | 7,354 |
Ending balance | 7,041 |
Consumer lending | Other consumer |  |
Allowance for loan losses |  |
Beginning balance | 3,127 |
Ending balance | 4,524 |
Non-PCI Loans |  |
Allowance for loan losses |  |
Beginning balance | 287,070 | 260,402
(Reversal of) provision for loan losses | 19,933 | 8,046
Charge-offs | (18,463) | (7,209)
Recoveries | 9,067 | 1,768
Net recoveries (charge-offs) | (9,396) | (5,441)
Ending balance | 297,607 | 263,007
Non-PCI Loans | Commercial lending | Commercial and industrial (“C&I”) |  |
Allowance for loan losses |  |
Charge-offs | (18,445) | (7,057)
Recoveries | 7,687 | 455
Non-PCI Loans | Commercial lending | Commercial real estate (“CRE”) |  |
Allowance for loan losses |  |
Recoveries | 427 | 569
Non-PCI Loans | Commercial lending | Real estate loan | Multifamily |  |
Allowance for loan losses |  |
Recoveries | 333 | 567
Non-PCI Loans | Commercial lending | Construction and land |  |
Allowance for loan losses |  |
Charge-offs | 0 | (148)
Recoveries | 435 | 24
Non-PCI Loans | Consumer lending | Real estate loan | Single-family |  |
Allowance for loan losses |  |
Charge-offs | (1) | 0
Recoveries | 184 | 11
Non-PCI Loans | Consumer lending | Home equity lines of credit (“HELOCs”) |  |
Allowance for loan losses |  |
Recoveries | 0 | 24
Non-PCI Loans | Consumer lending | Other consumer |  |
Allowance for loan losses |  |
Charge-offs | 17 | (4)
Recoveries | 1 | 118
PCI Loans |  |
Allowance for loan losses |  |
Beginning balance | 58 | 118
(Reversal of) provision for loan losses | (11) | (31)
Ending balance | 47 | $ 87
PCI Loans | Commercial lending | Commercial and industrial (“C&I”) |  |
Allowance for loan losses |  |
Beginning balance | 0 |
Ending balance | 0 |
PCI Loans | Commercial lending | Commercial real estate (“CRE”) |  |
Allowance for loan losses |  |
Beginning balance | 58 |
Ending balance | 47 |
PCI Loans | Commercial lending | Real estate loan | Multifamily |  |
Allowance for loan losses |  |
Beginning balance | 0 |
Ending balance | 0 |
PCI Loans | Commercial lending | Construction and land |  |
Allowance for loan losses |  |
Beginning balance | 0 |
Ending balance | 0 |
PCI Loans | Consumer lending | Real estate loan | Single-family |  |
Allowance for loan losses |  |
Beginning balance | 0 |
Ending balance | 0 |
PCI Loans | Consumer lending | Home equity lines of credit (“HELOCs”) |  |
Allowance for loan losses |  |
Beginning balance | 0 |
Ending balance | 0 |
PCI Loans | Consumer lending | Other consumer |  |
Allowance for loan losses |  |
Beginning balance | 0 |
Ending balance | $ 0 |

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + 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 (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + 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 (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: 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 + 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=84173941&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=84173941&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 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: 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=82894903&loc=d3e15032-111544 + Details
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