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Loans Receivable and Allowance for Credit Losses (Loan Purchases, Sales and Transfers) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | $ 81,166,000 | $ 129,864,000 | $ 173,394,000 | $ 285,631,000
Sales | 78,776,000 | 178,916,000 | 173,519,000 | 293,203,000
Purchases | 178,471,000 | 309,776,000 | 326,285,000 | 389,822,000
Write-down of loans transferred from loans held-for-investment to loans held-for-sale recorded to allowance for loan losses | 317,000 | 13,300,000 | 390,000 | 13,400,000
Net gains from sales of loans held-for-sale during the period, excluding lower of cost or fair value adjustment | 15,000 | 2,300,000 | 930,000 | 3,900,000
Loans held-for-sale |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Lower of cost or fair value adjustment | 0 | 0 | 0 | 0
Commercial and industrial (“C&I”) | Originated |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Sales | 55,700,000 |  | 132,200,000 |
Commercial and industrial and commercial real estate | Originated |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Sales |  | 103,500,000 |  | 193,200,000
Loans sold in secondary market | Purchased |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Sales | 23,100,000 | 75,400,000 | 41,300,000 | 100,000,000.0
Commercial lending | Commercial and industrial (“C&I”) |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 79,593,000 | 99,449,000 | 155,166,000 | 245,840,000
Sales | 76,031,000 | 140,326,000 | 151,677,000 | 242,691,000
Purchases | 159,100,000 | 285,615,000 | 266,294,000 | 350,362,000
Commercial lending | Commercial real estate (“CRE”) |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 0 | 30,415,000 | 16,655,000 | 39,791,000
Sales | 0 | 30,415,000 | 16,655,000 | 39,791,000
Purchases | 0 | 0 | 0 | 0
Commercial lending | Real estate loan | Multifamily residential |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 0 | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Purchases | 1,734,000 | 3,249,000 | 5,952,000 | 3,435,000
Commercial lending | Construction and land |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 1,573,000 | 0 | 1,573,000 | 0
Sales | 1,573,000 | 0 | 1,573,000 | 0
Purchases | 0 | 0 | 0 | 0
Consumer lending | Real estate loan | Single-family residential |  |  |  |
Loans Receivable and Allowance for Credit Losses |  |  |  |
Loans transferred from held-for-investment to held-for-sale | 0 | 0 | 0 | 0
Sales | 1,172,000 | 8,175,000 | 3,614,000 | 10,721,000
Purchases | $ 17,637,000 | $ 20,912,000 | $ 54,039,000 | $ 36,025,000

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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + 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)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: 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 + Details
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- Definition Amount of decrease from sale and reclassification to held-for-sale of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 11 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919244-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans and leases that were sold during the reporting period. This element refers to the gain (loss) and not to the cash proceeds of the sales. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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