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Loans Receivable and Allowance for Credit Losses (Details 12) - USD ($) $ in Thousands | Sep. 30, 2017 | Jun. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | --- | ---
Allowance for loan losses |  |  |  |  |  |
Individually evaluated for impairment | $ 20,751 |  | $ 12,701 |  |  |
Collectively evaluated for impairment | 265,107 |  | 247,701 |  |  |
Allowance for loan losses | 285,926 | $ 276,316 | 260,520 | $ 255,812 | $ 266,768 | $ 264,959
Recorded investment in loans |  |  |  |  |  |
Individually evaluated for impairment | 165,564 |  | 206,055 |  |  |
Collectively evaluated for impairment | 27,827,520 |  | 24,654,639 |  |  |
Loans held-for-investment | 28,525,357 |  | 25,503,139 |  |  |
Acquired with deteriorated credit quality |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Allowance for loan losses | 68 |  | 118 |  |  |
Recorded investment in loans |  |  |  |  |  |
Loans held-for-investment | 532,273 |  | 642,445 |  |  |
CRE |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Individually evaluated for impairment | 1,012 |  | 1,326 |  |  |
Collectively evaluated for impairment | 73,237 |  | 71,478 |  |  |
Allowance for loan losses | 74,317 |  | 72,916 |  |  |
Recorded investment in loans |  |  |  |  |  |
Individually evaluated for impairment | 39,332 |  | 52,378 |  |  |
Collectively evaluated for impairment | 9,174,220 |  | 8,288,119 |  |  |
Loans held-for-investment | 9,527,180 |  | 8,690,863 |  |  |
CRE | Acquired with deteriorated credit quality |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Allowance for loan losses | 68 |  | 112 |  |  |
Recorded investment in loans |  |  |  |  |  |
Loans held-for-investment | 313,628 |  | 350,366 |  |  |
C&I |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Individually evaluated for impairment | 18,969 |  | 10,477 |  |  |
Collectively evaluated for impairment | 141,629 |  | 131,689 |  |  |
Allowance for loan losses | 160,598 |  | 142,167 |  |  |
Recorded investment in loans |  |  |  |  |  |
Individually evaluated for impairment | 93,800 |  | 125,619 |  |  |
Collectively evaluated for impairment | 10,538,790 |  | 9,476,557 |  |  |
Loans held-for-investment | 10,645,156 |  | 9,640,563 |  |  |
C&I | Acquired with deteriorated credit quality |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Allowance for loan losses | 0 |  | 1 |  |  |
Recorded investment in loans |  |  |  |  |  |
Loans held-for-investment | 12,566 |  | 38,387 |  |  |
Residential |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Individually evaluated for impairment | 766 |  | 867 |  |  |
Collectively evaluated for impairment | 43,139 |  | 36,466 |  |  |
Allowance for loan losses | 43,905 |  | 37,338 |  |  |
Recorded investment in loans |  |  |  |  |  |
Individually evaluated for impairment | 28,131 |  | 24,376 |  |  |
Collectively evaluated for impairment | 6,014,197 |  | 4,836,578 |  |  |
Loans held-for-investment | 6,232,965 |  | 5,095,718 |  |  |
Residential | Acquired with deteriorated credit quality |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Allowance for loan losses | 0 |  | 5 |  |  |
Recorded investment in loans |  |  |  |  |  |
Loans held-for-investment | 190,637 |  | 234,764 |  |  |
Consumer |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Individually evaluated for impairment | 4 |  | 31 |  |  |
Collectively evaluated for impairment | 7,102 |  | 8,068 |  |  |
Allowance for loan losses | 7,106 |  | 8,099 |  |  |
Recorded investment in loans |  |  |  |  |  |
Individually evaluated for impairment | 4,301 |  | 3,682 |  |  |
Collectively evaluated for impairment | 2,100,313 |  | 2,053,385 |  |  |
Loans held-for-investment | 2,120,056 |  | 2,075,995 |  |  |
Consumer | Acquired with deteriorated credit quality |  |  |  |  |  |
Allowance for loan losses |  |  |  |  |  |
Allowance for loan losses | 0 |  | 0 |  |  |
Recorded investment in loans |  |  |  |  |  |
Loans held-for-investment | $ 15,442 |  | $ 18,928 |  |  |

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- Definition Amount of valuation allowance for loan losses that are expected to be uncollectible that were collectively evaluated for impairment. + References No definition available. + Details
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- Definition Amount of valuation allowance for loan losses that are expected to be uncollectible that were individually evaluated for impairment. + References No definition available. + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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