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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | $ 607,506 | $ 557,003 | $ 619,983 | $ 358,287
(Reversal of) provision for credit losses on loans | (8,771) | 94,300 | (7,723) | 168,956
Gross charge-offs | (15,060) | (20,949) | (30,959) | (33,906)
Gross recoveries | 1,785 | 1,709 | 4,278 | 13,768
Total net (charge-offs) recoveries | (13,275) | (19,240) | (26,681) | (20,138)
Foreign currency translation adjustment | 264 | 8 | 145 | (192)
Allowance for loan losses, end of period | 585,724 | 632,071 | 585,724 | 632,071
Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 125,158
Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 483,445
Commercial lending | Commercial and industrial (“C&I”) |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | 394,084 | 362,629 | 398,040 | 238,376
(Reversal of) provision for credit losses on loans | (22,586) | 37,862 | (18,747) | 98,480
Gross charge-offs | (10,572) | (20,378) | (19,008) | (32,355)
Gross recoveries | 1,338 | 602 | 2,098 | 2,177
Total net (charge-offs) recoveries | (9,234) | (19,776) | (16,910) | (30,178)
Foreign currency translation adjustment | 264 | 8 | 145 | (192)
Allowance for loan losses, end of period | 362,528 | 380,723 | 362,528 | 380,723
Commercial lending | Commercial and industrial (“C&I”) | Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 74,237
Commercial lending | Commercial and industrial (“C&I”) | Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 312,613
Commercial lending | Commercial real estate (“CRE”) |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | 146,399 | 132,819 | 163,791 | 40,509
(Reversal of) provision for credit losses on loans | 19,375 | 43,315 | 9,098 | 54,750
Gross charge-offs | (4,134) | (320) | (11,329) | (1,274)
Gross recoveries | 322 | 226 | 402 | 9,886
Total net (charge-offs) recoveries | (3,812) | (94) | (10,927) | 8,612
Foreign currency translation adjustment | 0 | 0 | 0 | 0
Allowance for loan losses, end of period | 161,962 | 176,040 | 161,962 | 176,040
Commercial lending | Commercial real estate (“CRE”) | Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 72,169
Commercial lending | Commercial real estate (“CRE”) | Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 112,678
Commercial lending | Residential loan | Multifamily residential |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | 27,407 | 16,530 | 27,573 | 22,826
(Reversal of) provision for credit losses on loans | (5,385) | 7,908 | (6,776) | 9,189
Gross charge-offs | (113) | 0 | (130) | 0
Gross recoveries | 16 | 620 | 1,258 | 1,155
Total net (charge-offs) recoveries | (97) | 620 | 1,128 | 1,155
Foreign currency translation adjustment | 0 | 0 | 0 | 0
Allowance for loan losses, end of period | 21,925 | 25,058 | 21,925 | 25,058
Commercial lending | Residential loan | Multifamily residential | Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | (8,112)
Commercial lending | Residential loan | Multifamily residential | Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 14,714
Commercial lending | Construction and land |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | 19,089 | 11,018 | 10,239 | 19,404
(Reversal of) provision for credit losses on loans | (3,243) | 7,526 | 5,349 | 9,008
Gross charge-offs | (209) | 0 | (280) | 0
Gross recoveries | 6 | 7 | 335 | 28
Total net (charge-offs) recoveries | (203) | 7 | 55 | 28
Foreign currency translation adjustment | 0 | 0 | 0 | 0
Allowance for loan losses, end of period | 15,643 | 18,551 | 15,643 | 18,551
Commercial lending | Construction and land | Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | (9,889)
Commercial lending | Construction and land | Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 9,515
Consumer lending | Residential loan | Single-family residential |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | 15,839 | 26,822 | 15,520 | 28,527
(Reversal of) provision for credit losses on loans | 609 | (1,667) | 985 | 33
Gross charge-offs | 0 | 0 | (134) | 0
Gross recoveries | 82 | 159 | 159 | 424
Total net (charge-offs) recoveries | 82 | 159 | 25 | 424
Foreign currency translation adjustment | 0 | 0 | 0 | 0
Allowance for loan losses, end of period | 16,530 | 25,314 | 16,530 | 25,314
Consumer lending | Residential loan | Single-family residential | Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | (3,670)
Consumer lending | Residential loan | Single-family residential | Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 24,857
Consumer lending | HELOCs |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | 2,670 | 3,881 | 2,690 | 5,265
(Reversal of) provision for credit losses on loans | 250 | 205 | 272 | 617
Gross charge-offs | 0 | (221) | (45) | (221)
Gross recoveries | 18 | 2 | 21 | 4
Total net (charge-offs) recoveries | 18 | (219) | (24) | (217)
Foreign currency translation adjustment | 0 | 0 | 0 | 0
Allowance for loan losses, end of period | 2,938 | 3,867 | 2,938 | 3,867
Consumer lending | HELOCs | Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | (1,798)
Consumer lending | HELOCs | Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 3,467
Consumer lending | Other consumer |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period | 2,018 | 3,304 | 2,130 | 3,380
(Reversal of) provision for credit losses on loans | 2,209 | (849) | 2,096 | (3,121)
Gross charge-offs | (32) | (30) | (33) | (56)
Gross recoveries | 3 | 93 | 5 | 94
Total net (charge-offs) recoveries | (29) | 63 | (28) | 38
Foreign currency translation adjustment | 0 | 0 | 0 | 0
Allowance for loan losses, end of period | $ 4,198 | $ 2,518 | $ 4,198 | 2,518
Consumer lending | Other consumer | Cumulative Effect, Period Of Adoption, Adjustment | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | 2,221
Consumer lending | Other consumer | Cumulative Effect, Period of Adoption, Adjusted Balance | ASU 2016-13 |  |  |  |
Allowance for loan losses |  |  |  |
Allowance for loan losses, beginning of period |  |  |  | $ 5,601

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