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Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans and Leases Receivable, Gross | $ 4,267,430 | $ 4,097,050
Non-Covered Loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30-89 Days Past Due | 13,697 | 10,828
90 or More Days Past Due | 8,113 | 2,715
Total Past Due | 21,810 | 13,543
Current | 4,196,531 | 4,009,353
Loans and Leases Receivable, Gross | 4,218,341 | 4,022,896
Total | 4,219,689 | 4,024,221
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30-89 Days Past Due | 11,213 | 7,882
90 or More Days Past Due | 6,020 | 1,770
Total Past Due | 17,233 | 9,652
Current | 2,015,696 | 1,909,068
Total | 2,032,929 | 1,918,720
Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30-89 Days Past Due | 1,362 | 934
90 or More Days Past Due | 129 | 0
Total Past Due | 1,491 | 934
Current | 824,956 | 768,341
Total | 826,447 | 769,275
Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30-89 Days Past Due | 258 | 0
90 or More Days Past Due | 808 | 0
Total Past Due | 1,066 | 0
Current | 587,979 | 554,589
Total | 589,045 | 554,589
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30-89 Days Past Due | 0 | 76
90 or More Days Past Due | 0 | 0
Total Past Due | 0 | 76
Current | 326,858 | 303,015
Total | 326,858 | 303,091
Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30-89 Days Past Due | 864 | 1,529
90 or More Days Past Due | 1,156 | 945
Total Past Due | 2,020 | 2,474
Current | 306,365 | 338,838
Total | 308,385 | 341,312
Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
30-89 Days Past Due | 0 | 407
90 or More Days Past Due | 0 | 0
Total Past Due | 0 | 407
Current | 134,677 | 135,502
Loans and Leases Receivable, Gross | 134,677 | 135,909
Total | $ 136,025 | $ 137,234

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- Definition Financing Receivable, Recorded Investment, 30 to 89 Days Past Due + References No definition available. + Details
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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes 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 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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