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Loans Receivable and Allowance for Loan Losses - Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Dec. 31, 2018
Allowance for Loan Losses and the Loans Receivables by Impairment Methodology |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  |  |  |  | $ 736 | $ 736
Credit for unfunded loan commitments | $ 0 | $ 150 | $ 0 | $ (50) |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 94,217 | 86,461 | 92,557 | 84,541 |  |
Provision (credit) for loan losses | 1,200 | 2,300 | 4,200 | 4,800 |  |
Loans charged off | (2,076) | (1,263) | (3,830) | (2,331) |  |
Recoveries of charge offs | 725 | 2,383 | 2,017 | 2,871 |  |
PCI allowance adjustment |  |  | (878) |  |  |
Balance, end of period | 94,066 | 89,881 | 94,066 | 89,881 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 5,933 | 4,791
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 79,050 | 75,603
Allowance for loan losses - Total | 94,217 | 86,461 | 94,066 | 84,541 | 94,066 | 92,557
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 105,970 | 104,007
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 11,742,529 | 11,846,646
Loans outstanding - Total |  |  |  |  | 11,976,007 | 12,097,906
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 12,163 |  |  |
Balance, end of period | 9,083 |  | 9,083 |  |  |
Allowance for loan losses - Total | 9,083 |  | 9,083 |  | 9,083 | 12,163
Loans outstanding - Total |  |  |  |  | 127,508 | 147,253
Loans outstanding - PCI loans |  |  |  |  | 36,400 | 57,500
Legacy Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Loans outstanding - Total |  |  |  |  | 10,355,503 | 10,199,858
Acquired Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Provision (credit) for loan losses | (503) | (253) | (383) | (2,500) |  |
Provision (credit) for PCI loan losses | (1,200) | (449) | (2,200) | (637) |  |
Loans outstanding - Total |  |  |  |  | 1,620,504 | 1,898,048
Real estate |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Loans outstanding - Total |  |  |  |  | 8,630,852 | 8,721,600
Real estate | Legacy Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 45,876 | 45,977 | 49,446 | 45,360 |  |
Provision (credit) for loan losses | 1,195 | 1,776 | (3,463) | 2,255 |  |
Loans charged off | (182) | (144) | (216) | (207) |  |
Recoveries of charge offs | 265 | 626 | 1,387 | 827 |  |
Balance, end of period | 47,154 | 48,235 | 47,154 | 48,235 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 192 | 176
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 46,962 | 49,270
Allowance for loan losses - Total | 45,876 | 45,977 | 47,154 | 45,360 | 47,154 | 49,446
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 46,785 | 39,976
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 7,160,408 | 7,037,392
Loans outstanding - Total |  |  |  |  | 7,207,193 | 7,077,368
Real estate | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 0 |  |  |
Balance, end of period | 0 |  | 0 |  |  |
Allowance for loan losses - Total | 0 |  | 0 |  | 0 | 0
Loans outstanding - Total |  |  |  |  | 0 | 0
Real estate | Acquired Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 7,261 | 13,048 | 7,321 | 13,322 |  |
Provision (credit) for loan losses | (636) | (141) | (675) | (314) |  |
Loans charged off | 0 | (92) | (26) | (194) |  |
Recoveries of charge offs | 305 | 1 | 310 | 2 |  |
Balance, end of period | 6,930 | 12,816 | 6,930 | 12,816 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 127 | 261
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 1,682 | 1,264
Allowance for loan losses - Total | 7,261 | 13,048 | 6,930 | 12,816 | 6,930 | 7,321
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 19,578 | 18,080
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 1,289,871 | 1,507,858
Loans outstanding - Total |  |  |  |  | 1,423,659 | 1,644,232
Real estate | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 5,796 |  |  |
Balance, end of period | 5,121 |  | 5,121 |  |  |
Allowance for loan losses - Total | 5,121 |  | 5,121 |  | 5,121 | 5,796
Loans outstanding - Total |  |  |  |  | 114,210 | 118,294
Commercial business |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 27,765 |  |  |
Balance, end of period | 31,355 |  | 31,355 |  |  |
Allowance for loan losses - Total | 31,355 |  | 31,355 |  | 31,355 | 27,765
Loans outstanding - Total |  |  |  |  | 2,265,287 | 2,127,630
Commercial business | Legacy Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 27,376 | 20,387 | 21,826 | 17,228 |  |
Provision (credit) for loan losses | 183 | 487 | 6,804 | 3,776 |  |
Loans charged off | (922) | (446) | (2,082) | (788) |  |
Recoveries of charge offs | 120 | 1,603 | 209 | 1,815 |  |
Balance, end of period | 26,757 | 22,031 | 26,757 | 22,031 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 4,282 | 4,221
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 22,475 | 17,605
Allowance for loan losses - Total | 27,376 | 20,387 | 26,757 | 22,031 | 26,757 | 21,826
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 26,159 | 29,624
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 2,168,442 | 1,988,067
Loans outstanding - Total |  |  |  |  | 2,194,601 | 2,017,691
Commercial business | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 0 |  |  |
Balance, end of period | 0 |  | 0 |  |  |
Allowance for loan losses - Total | 0 |  | 0 |  | 0 | 0
Loans outstanding - Total |  |  |  |  | 0 | 0
Commercial business | Acquired Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 5,000 | 1,308 | 5,939 | 3,527 |  |
Provision (credit) for loan losses | 195 | (96) | 313 | (2,142) |  |
Loans charged off | (629) | (352) | (877) | (566) |  |
Recoveries of charge offs | 32 | 131 | 101 | 172 |  |
PCI allowance adjustment |  |  | (878) |  |  |
Balance, end of period | 4,598 | 991 | 4,598 | 991 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 987 | 130
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 574 | 460
Allowance for loan losses - Total | 5,000 | 1,308 | 4,598 | 3,527 | 4,598 | 5,939
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 4,228 | 5,734
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 58,080 | 80,916
Loans outstanding - Total |  |  |  |  | 70,686 | 109,939
Commercial business | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 5,349 |  |  |
Balance, end of period | 3,037 |  | 3,037 |  |  |
Allowance for loan losses - Total | 3,037 |  | 3,037 |  | 3,037 | 5,349
Loans outstanding - Total |  |  |  |  | 8,378 | 23,289
Trade finance |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 719 |  |  |
Balance, end of period | 1,009 |  | 1,009 |  |  |
Allowance for loan losses - Total | 1,009 |  | 1,009 |  | 1,009 | 719
Loans outstanding - Total |  |  |  |  | 166,781 | 197,190
Trade finance | Legacy Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 698 | 1,767 | 719 | 1,674 |  |
Provision (credit) for loan losses | 311 | (796) | 290 | (715) |  |
Loans charged off | 0 | 0 | 0 | 0 |  |
Recoveries of charge offs | 0 | 12 | 0 | 24 |  |
Balance, end of period | 1,009 | 983 | 1,009 | 983 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 333 | 0
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 676 | 719
Allowance for loan losses - Total | 698 | 1,767 | 1,009 | 1,674 | 1,009 | 719
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 2,825 | 5,887
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 160,638 | 188,179
Loans outstanding - Total |  |  |  |  | 163,463 | 194,066
Trade finance | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 0 |  |  |
Balance, end of period | 0 |  | 0 |  |  |
Allowance for loan losses - Total | 0 |  | 0 |  | 0 | 0
Loans outstanding - Total |  |  |  |  | 0 | 0
Trade finance | Acquired Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 0 | 38 | 0 | 42 |  |
Provision (credit) for loan losses | 0 | (35) | 0 | (39) |  |
Loans charged off | 0 | 0 | 0 | 0 |  |
Recoveries of charge offs | 0 | 0 | 0 | 0 |  |
Balance, end of period | 0 | 3 | 0 | 3 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 0 | 0
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 0 | 0
Allowance for loan losses - Total | 0 | 38 | 0 | 3 | 0 | 0
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 3,318 | 3,124
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 0 | 0
Loans outstanding - Total |  |  |  |  | 3,318 | 3,124
Trade finance | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 0 |  |  |
Balance, end of period | 0 |  | 0 |  |  |
Allowance for loan losses - Total | 0 |  | 0 |  | 0 | 0
Loans outstanding - Total |  |  |  |  | 0 | 0
Consumer and other |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 7,306 |  |  |
Balance, end of period | 7,618 |  | 7,618 |  |  |
Allowance for loan losses - Total | 7,618 |  | 7,618 |  | 7,618 | 7,306
Loans outstanding - Total |  |  |  |  | 913,087 | 1,051,486
Consumer and other | Legacy Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 7,004 | 3,934 | 6,269 | 3,385 |  |
Provision (credit) for loan losses | 14 | 1,086 | 952 | 1,963 |  |
Loans charged off | (343) | (229) | (553) | (576) |  |
Recoveries of charge offs | 1 | 8 | 8 | 27 |  |
Balance, end of period | 6,676 | 4,799 | 6,676 | 4,799 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 11 | 3
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 6,665 | 6,266
Allowance for loan losses - Total | 7,004 | 3,934 | 6,676 | 3,385 | 6,676 | 6,269
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 2,266 | 441
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 787,980 | 910,292
Loans outstanding - Total |  |  |  |  | 790,246 | 910,733
Consumer and other | Legacy Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 0 |  |  |
Balance, end of period | 0 |  | 0 |  |  |
Allowance for loan losses - Total | 0 |  | 0 |  | 0 | 0
Loans outstanding - Total |  |  |  |  | 0 | 0
Consumer and other | Acquired Loans |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period | 1,002 | 2 | 1,037 | 3 |  |
Provision (credit) for loan losses | (62) | 19 | (21) | 16 |  |
Loans charged off | 0 | 0 | (76) | 0 |  |
Recoveries of charge offs | 2 | 2 | 2 | 4 |  |
Balance, end of period | 942 | 23 | 942 | 23 |  |
Allowance for loan losses - Individually evaluated for impairment |  |  |  |  | 1 | 0
Allowance for loan losses - Collectively evaluated for impairment |  |  |  |  | 16 | 19
Allowance for loan losses - Total | 1,002 | $ 2 | 1,037 | $ 3 | 942 | 1,037
Loans outstanding - Individually evaluated for impairment |  |  |  |  | 811 | 1,141
Loans outstanding - Collectively evaluated for impairment |  |  |  |  | 117,110 | 133,942
Loans outstanding - Total |  |  |  |  | 122,841 | 140,753
Consumer and other | Acquired Loans | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Allowance for Loan Losses by Portfolio Segment |  |  |  |  |  |
Balance, beginning of period |  |  | 1,018 |  |  |
Balance, end of period | 925 |  | 925 |  |  |
Allowance for loan losses - Total | $ 925 |  | $ 925 |  | 925 | 1,018
Loans outstanding - Total |  |  |  |  | $ 4,920 | $ 5,670

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