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Loans Receivable and Allowance for Credit Losses (Non-PCI Impaired Loans) (Details) - Non-PCI Loans - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | $ 223,744 |  | $ 223,744 |  | $ 152,627
Recorded Investment With No Allowance | 120,645 |  | 120,645 |  | 87,812
Recorded Investment With Allowance | 62,066 |  | 62,066 |  | 31,106
Total Recorded Investment | 182,711 |  | 182,711 |  | 118,918
Related Allowance | 16,454 |  | 16,454 |  | 4,032
Average Recorded Investment | 225,800 | $ 164,114 | 287,022 | $ 228,915 |
Recognized Interest Income | 673 | 637 | 3,173 | 1,648 |
Commercial lending |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 190,381 |  | 190,381 |  | 125,420
Recorded Investment With No Allowance | 108,342 |  | 108,342 |  | 79,713
Recorded Investment With Allowance | 42,376 |  | 42,376 |  | 13,287
Total Recorded Investment | 150,718 |  | 150,718 |  | 93,000
Related Allowance | 13,925 |  | 13,925 |  | 1,502
Average Recorded Investment | 184,135 | 132,726 | 237,209 | 193,319 |
Recognized Interest Income | 512 | 500 | 2,698 | 1,250 |
Commercial lending | Commercial and industrial (“C&I”) |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 154,618 |  | 154,618 |  | 82,963
Recorded Investment With No Allowance | 82,798 |  | 82,798 |  | 48,479
Recorded Investment With Allowance | 38,305 |  | 38,305 |  | 8,609
Total Recorded Investment | 121,103 |  | 121,103 |  | 57,088
Related Allowance | 13,783 |  | 13,783 |  | 1,219
Average Recorded Investment | 150,063 | 94,095 | 198,024 | 142,259 |
Recognized Interest Income | 340 | 328 | 2,156 | 685 |
Commercial lending | Commercial real estate (“CRE”) |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 30,573 |  | 30,573 |  | 36,426
Recorded Investment With No Allowance | 23,653 |  | 23,653 |  | 28,285
Recorded Investment With Allowance | 1,223 |  | 1,223 |  | 2,067
Total Recorded Investment | 24,876 |  | 24,876 |  | 30,352
Related Allowance | 98 |  | 98 |  | 208
Average Recorded Investment | 28,846 | 31,891 | 33,329 | 35,311 |
Recognized Interest Income | 114 | 116 | 363 | 375 |
Commercial lending | Real estate loan | Multifamily residential |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 5,190 |  | 5,190 |  | 6,031
Recorded Investment With No Allowance | 1,891 |  | 1,891 |  | 2,949
Recorded Investment With Allowance | 2,848 |  | 2,848 |  | 2,611
Total Recorded Investment | 4,739 |  | 4,739 |  | 5,560
Related Allowance | 44 |  | 44 |  | 75
Average Recorded Investment | 5,226 | 6,740 | 5,856 | 11,776 |
Recognized Interest Income | 58 | 56 | 179 | 190 |
Commercial lending | Construction and land |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Average Recorded Investment | 0 | 0 | 0 | 3,973 |
Recognized Interest Income | 0 | 0 | 0 | 0 |
Consumer lending |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 33,363 |  | 33,363 |  | 27,207
Recorded Investment With No Allowance | 12,303 |  | 12,303 |  | 8,099
Recorded Investment With Allowance | 19,690 |  | 19,690 |  | 17,819
Total Recorded Investment | 31,993 |  | 31,993 |  | 25,918
Related Allowance | 2,529 |  | 2,529 |  | 2,530
Average Recorded Investment | 41,665 | 31,388 | 49,813 | 35,596 |
Recognized Interest Income | 161 | 137 | 475 | 398 |
Consumer lending | Real estate loan | Single-family residential |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 18,299 |  | 18,299 |  | 14,670
Recorded Investment With No Allowance | 4,311 |  | 4,311 |  | 2,552
Recorded Investment With Allowance | 12,689 |  | 12,689 |  | 10,908
Total Recorded Investment | 17,000 |  | 17,000 |  | 13,460
Related Allowance | 34 |  | 34 |  | 34
Average Recorded Investment | 23,779 | 18,423 | 27,758 | 21,208 |
Recognized Interest Income | 124 | 119 | 382 | 347 |
Consumer lending | HELOCs |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 12,569 |  | 12,569 |  | 10,035
Recorded Investment With No Allowance | 7,992 |  | 7,992 |  | 5,547
Recorded Investment With Allowance | 4,506 |  | 4,506 |  | 4,409
Total Recorded Investment | 12,498 |  | 12,498 |  | 9,956
Related Allowance | 4 |  | 4 |  | 5
Average Recorded Investment | 15,382 | 10,474 | 19,529 | 11,897 |
Recognized Interest Income | 37 | 18 | 93 | 51 |
Consumer lending | Other consumer |  |  |  |  |
Impaired loans disclosures |  |  |  |  |
Unpaid Principal Balance | 2,495 |  | 2,495 |  | 2,502
Recorded Investment With No Allowance | 0 |  | 0 |  | 0
Recorded Investment With Allowance | 2,495 |  | 2,495 |  | 2,502
Total Recorded Investment | 2,495 |  | 2,495 |  | 2,502
Related Allowance | 2,491 |  | 2,491 |  | $ 2,491
Average Recorded Investment | 2,504 | 2,491 | 2,526 | 2,491 |
Recognized Interest Income | $ 0 | $ 0 | $ 0 | $ 0 |

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