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Loans Receivable and Allowance for Credit Losses (Summary of Activities in Allowance for Loan Losses) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance for loan losses |  |  |
Allowance, beginning of period | $ 311,322 | $ 287,128 |
Gross charge-offs | (789) | (14,600) | $ (473)
Allowance, end of period | 358,287 | 311,322 | 287,128
Commercial Lending | C&I |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 189,117 |  |
Allowance, end of period | 238,376 | 189,117 |
Commercial Lending | CRE |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 40,666 |  |
Allowance, end of period | 40,509 | 40,666 |
Commercial Lending | Residential loan | Multifamily |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 19,885 |  |
Allowance, end of period | 22,826 | 19,885 |
Commercial Lending | Construction and land |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 20,290 |  |
Allowance, end of period | 19,404 | 20,290 |
Consumer Lending | Residential loan | Single-family |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 31,340 |  |
Allowance, end of period | 28,527 | 31,340 |
Consumer Lending | HELOCs |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 5,774 |  |
Allowance, end of period | 5,265 | 5,774 |
Consumer Lending | Other consumer |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 4,250 |  |
Allowance, end of period | 3,380 | 4,250 |
Non-PCI loans |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 311,300 | 287,070 | 260,402
Provision for (reversal of) on loans | 100,115 | 65,043 | 49,129
Gross charge-offs | (75,067) | (59,433) | (38,975)
Gross recoveries | 22,264 | 19,363 | 15,820
Net charge-offs | (52,803) | (40,070) | (23,155)
Foreign currency translation adjustments | (325) | (743) | 694
Allowance, end of period | 358,287 | 311,300 | 287,070
Non-PCI loans | Commercial Lending | C&I |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | (73,985) | (59,244) | (38,118)
Gross recoveries | 14,501 | 10,417 | 11,371
Non-PCI loans | Commercial Lending | CRE |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | (1,021) | 0 | 0
Gross recoveries | 5,209 | 5,194 | 2,111
Non-PCI loans | Commercial Lending | Residential loan | Multifamily |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | 0 | 0 | (635)
Gross recoveries | 1,856 | 1,757 | 1,357
Non-PCI loans | Commercial Lending | Construction and land |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | 0 | 0 | (149)
Gross recoveries | 536 | 740 | 259
Non-PCI loans | Commercial Lending | Total CRE |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | (1,021) | 0 | (784)
Gross recoveries | 7,601 | 7,691 | 3,727
Non-PCI loans | Consumer Lending | Residential loan | Single-family |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | (11) | (1) | (1)
Gross recoveries | 136 | 1,214 | 546
Non-PCI loans | Consumer Lending | HELOCs |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | 0 | 0 | (55)
Gross recoveries | 7 | 38 | 24
Non-PCI loans | Consumer Lending | Total residential mortgage |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | (11) | (1) | (56)
Gross recoveries | 143 | 1,252 | 570
Non-PCI loans | Consumer Lending | Other consumer |  |  |
Allowance for loan losses |  |  |
Gross charge-offs | (50) | (188) | (17)
Gross recoveries | 19 | 3 | 152
PCI Loans |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 22 | 58 | 118
Provision for (reversal of) on loans | (22) | (36) | (60)
Allowance, end of period | 0 | 22 | $ 58
PCI Loans | Commercial Lending | C&I |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 0 |  |
Allowance, end of period | 0 | 0 |
PCI Loans | Commercial Lending | CRE |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 22 |  |
Allowance, end of period | 0 | 22 |
PCI Loans | Commercial Lending | Residential loan | Multifamily |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 0 |  |
Allowance, end of period | 0 | 0 |
PCI Loans | Commercial Lending | Construction and land |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 0 |  |
Allowance, end of period | 0 | 0 |
PCI Loans | Consumer Lending | Residential loan | Single-family |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 0 |  |
Allowance, end of period | 0 | 0 |
PCI Loans | Consumer Lending | HELOCs |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 0 |  |
Allowance, end of period | 0 | 0 |
PCI Loans | Consumer Lending | Other consumer |  |  |
Allowance for loan losses |  |  |
Allowance, beginning of period | 0 |  |
Allowance, end of period | $ 0 | $ 0 |

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition Amount of gain (loss) from converting allowance reserve for credit loss to currency of reporting entity from amount denominated or measured in a different currency, which decreases (increases) the allowance for loan and lease losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
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