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Loans Receivable and Allowance for Loan Losses - Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 11,976,007 | $ 12,097,906
Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 11,465,680 | 11,616,490
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 186,485 | 163,089
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 323,841 | 317,915
Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1 | 412
Real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 8,630,852 | 8,721,600
Real estate | Residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 51,167 | 51,197
Real estate | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 8,301,315 | 8,395,327
Real estate | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 278,370 | 275,076
Commercial business |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,265,287 | 2,127,630
Trade finance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 166,781 | 197,190
Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 913,087 | 1,051,486
Legacy Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 10,355,503 | 10,199,858
Legacy Loans | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 10,005,777 | 9,884,742
Legacy Loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 147,050 | 121,622
Legacy Loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 202,676 | 193,494
Legacy Loans | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 7,207,193 | 7,077,368
Legacy Loans | Real estate | Residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 46,089 | 44,612
Legacy Loans | Real estate | Residential | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 45,944 | 44,066
Legacy Loans | Real estate | Residential | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Residential | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 145 | 546
Legacy Loans | Real estate | Residential | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Commercial | Retail |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,856,206 | 1,863,928
Legacy Loans | Real estate | Commercial | Retail | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,784,344 | 1,815,170
Legacy Loans | Real estate | Commercial | Retail | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 35,150 | 18,072
Legacy Loans | Real estate | Commercial | Retail | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 36,712 | 30,686
Legacy Loans | Real estate | Commercial | Retail | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Commercial | Hotel & motel |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,432,032 | 1,427,150
Legacy Loans | Real estate | Commercial | Hotel & motel | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,389,821 | 1,389,349
Legacy Loans | Real estate | Commercial | Hotel & motel | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 10,341 | 21,932
Legacy Loans | Real estate | Commercial | Hotel & motel | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 31,870 | 15,869
Legacy Loans | Real estate | Commercial | Hotel & motel | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Commercial | Gas station & car wash |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 823,543 | 819,565
Legacy Loans | Real estate | Commercial | Gas station & car wash | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 818,660 | 814,291
Legacy Loans | Real estate | Commercial | Gas station & car wash | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,761 | 2,810
Legacy Loans | Real estate | Commercial | Gas station & car wash | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,122 | 2,464
Legacy Loans | Real estate | Commercial | Gas station & car wash | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Commercial | Mixed use |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 576,570 | 535,793
Legacy Loans | Real estate | Commercial | Mixed use | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 550,044 | 510,021
Legacy Loans | Real estate | Commercial | Mixed use | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 12,967 | 12,480
Legacy Loans | Real estate | Commercial | Mixed use | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 13,559 | 13,292
Legacy Loans | Real estate | Commercial | Mixed use | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Commercial | Industrial & warehouse |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 756,608 | 751,233
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 721,166 | 711,236
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 945 | 1,665
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 34,497 | 38,332
Legacy Loans | Real estate | Commercial | Industrial & warehouse | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Commercial | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,447,464 | 1,396,952
Legacy Loans | Real estate | Commercial | Other | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,375,120 | 1,326,795
Legacy Loans | Real estate | Commercial | Other | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 32,591 | 35,539
Legacy Loans | Real estate | Commercial | Other | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 39,753 | 34,618
Legacy Loans | Real estate | Commercial | Other | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 268,681 | 238,135
Legacy Loans | Real estate | Construction | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 252,432 | 227,231
Legacy Loans | Real estate | Construction | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 16,249 | 10,904
Legacy Loans | Real estate | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Real estate | Construction | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Commercial business |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,194,601 | 2,017,691
Legacy Loans | Commercial business | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,119,781 | 1,944,783
Legacy Loans | Commercial business | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 35,789 | 18,220
Legacy Loans | Commercial business | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 39,031 | 54,688
Legacy Loans | Commercial business | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Trade finance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 163,463 | 194,066
Legacy Loans | Trade finance | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 160,669 | 191,508
Legacy Loans | Trade finance | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 73 | 0
Legacy Loans | Trade finance | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,721 | 2,558
Legacy Loans | Trade finance | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Legacy Loans | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 790,246 | 910,733
Legacy Loans | Consumer and other | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 787,796 | 910,292
Legacy Loans | Consumer and other | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 184 | 0
Legacy Loans | Consumer and other | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,266 | 441
Legacy Loans | Consumer and other | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,620,504 | 1,898,048
Acquired Loans | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,459,903 | 1,731,748
Acquired Loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 39,435 | 41,467
Acquired Loans | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 121,165 | 124,421
Acquired Loans | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1 | 412
Acquired Loans | Real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,423,659 | 1,644,232
Acquired Loans | Real estate | Residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 5,078 | 6,585
Acquired Loans | Real estate | Residential | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 4,362 | 5,812
Acquired Loans | Real estate | Residential | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 387 | 393
Acquired Loans | Real estate | Residential | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 329 | 380
Acquired Loans | Real estate | Residential | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Real estate | Commercial | Retail |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 429,701 | 505,957
Acquired Loans | Real estate | Commercial | Retail | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 401,670 | 483,939
Acquired Loans | Real estate | Commercial | Retail | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 5,844 | 4,651
Acquired Loans | Real estate | Commercial | Retail | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 22,187 | 17,332
Acquired Loans | Real estate | Commercial | Retail | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 35
Acquired Loans | Real estate | Commercial | Hotel & motel |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 185,560 | 207,040
Acquired Loans | Real estate | Commercial | Hotel & motel | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 166,101 | 186,761
Acquired Loans | Real estate | Commercial | Hotel & motel | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 298 | 807
Acquired Loans | Real estate | Commercial | Hotel & motel | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 19,161 | 19,472
Acquired Loans | Real estate | Commercial | Hotel & motel | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Real estate | Commercial | Gas station & car wash |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 126,679 | 155,008
Acquired Loans | Real estate | Commercial | Gas station & car wash | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 121,640 | 148,702
Acquired Loans | Real estate | Commercial | Gas station & car wash | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 274
Acquired Loans | Real estate | Commercial | Gas station & car wash | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 5,039 | 6,032
Acquired Loans | Real estate | Commercial | Gas station & car wash | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Real estate | Commercial | Mixed use |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 99,517 | 89,237
Acquired Loans | Real estate | Commercial | Mixed use | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 87,781 | 77,100
Acquired Loans | Real estate | Commercial | Mixed use | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 7,225 | 3,986
Acquired Loans | Real estate | Commercial | Mixed use | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 4,511 | 8,151
Acquired Loans | Real estate | Commercial | Mixed use | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Real estate | Commercial | Industrial & warehouse |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 176,848 | 199,319
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 153,008 | 171,574
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 4,132 | 9,451
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 19,708 | 18,071
Acquired Loans | Real estate | Commercial | Industrial & warehouse | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 223
Acquired Loans | Real estate | Commercial | Other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 390,587 | 444,145
Acquired Loans | Real estate | Commercial | Other | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 351,841 | 402,247
Acquired Loans | Real estate | Commercial | Other | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 10,066 | 12,902
Acquired Loans | Real estate | Commercial | Other | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 28,680 | 28,996
Acquired Loans | Real estate | Commercial | Other | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Real estate | Construction |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 9,689 | 36,941
Acquired Loans | Real estate | Construction | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 29,058
Acquired Loans | Real estate | Construction | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 9,689 | 7,883
Acquired Loans | Real estate | Construction | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Real estate | Construction | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Commercial business |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 70,686 | 109,939
Acquired Loans | Commercial business | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 53,607 | 89,611
Acquired Loans | Commercial business | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1,778 | 1,083
Acquired Loans | Commercial business | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 15,300 | 19,237
Acquired Loans | Commercial business | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 1 | 8
Acquired Loans | Trade finance |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 3,318 | 3,124
Acquired Loans | Trade finance | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Trade finance | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Trade finance | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 3,318 | 3,124
Acquired Loans | Trade finance | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 0 | 0
Acquired Loans | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 122,841 | 140,753
Acquired Loans | Consumer and other | Pass/Not Rated |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 119,893 | 136,944
Acquired Loans | Consumer and other | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 16 | 37
Acquired Loans | Consumer and other | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | 2,932 | 3,626
Acquired Loans | Consumer and other | Doubtful or Loss |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans | $ 0 | $ 146

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