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Loans - Summary of Recorded Investment in Portfolio Loans by Class and Category Based on Impairment Method (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2017 USD ($) loan | Jun. 30, 2016 USD ($) loan | Jun. 30, 2017 USD ($) loan | Jun. 30, 2016 USD ($) loan | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Loans - Ending balance: |  |  |  |  |  |
Loans and Leases Receivable, Gross | $ 3,894,770 |  | $ 3,894,770 |  |  | $ 3,158,161
Portfolio loans, net |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loan | 1 | 2 | 1 | 4 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 676 | $ 2,320 | $ 676 | $ 2,609 |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 676 | $ 2,320 | 676 | $ 2,609 |  |
Individually evaluated for impairment | 1,799 |  | 1,799 |  |  | 3,064
Collectively evaluated for impairment | 34,874 |  | 34,874 |  |  | 34,501
Total | 36,673 |  | 36,673 |  | $ 39,148 | 37,565
Impaired Financing Receivable, Related Allowance | 1,755 |  | 1,755 |  |  | 3,064
Loans - Ending balance: |  |  |  |  |  |
Individually evaluated for impairment | 14,839 |  | 14,839 |  |  | 16,772
Collectively evaluated for impairment | 3,795,631 |  | 3,795,631 |  |  | 3,101,620
Total | 3,811,345 |  | 3,811,345 |  |  | 3,119,154
Loans and Leases Receivable, Gross | $ 3,810,470 |  | $ 3,810,470 |  |  | 3,118,392
Portfolio loans, net | Commercial and industrial |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loan | 1 | 1 | 1 | 2 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 676 | $ 2,300 | $ 676 | $ 2,341 |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 676 | $ 2,300 | 676 | $ 2,341 |  |
Individually evaluated for impairment | 1,616 |  | 1,616 |  |  | 2,909
Collectively evaluated for impairment | 24,139 |  | 24,139 |  |  | 24,087
Total | 25,755 |  | 25,755 |  | 28,778 | 26,996
Impaired Financing Receivable, Related Allowance | 1,572 |  | 1,572 |  |  | 2,909
Loans - Ending balance: |  |  |  |  |  |
Individually evaluated for impairment | 10,209 |  | 10,209 |  |  | 12,523
Collectively evaluated for impairment | 1,785,458 |  | 1,785,458 |  |  | 1,620,191
Total | $ 1,795,667 |  | $ 1,795,667 |  |  | 1,632,714
Portfolio loans, net | Commercial Real Estate Investor Owned |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 0 | 0 | 1 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0 | $ 0 | $ 248 |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 0 | $ 0 | 0 | $ 248 |  |
Individually evaluated for impairment |  |  |  |  |  | 0
Collectively evaluated for impairment | 3,387 |  | 3,387 |  |  | 3,420
Total | 3,387 |  | 3,387 |  | 3,324 | 3,420
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  |  | 0
Loans - Ending balance: |  |  |  |  |  |
Individually evaluated for impairment | 287 |  | 287 |  |  | 430
Collectively evaluated for impairment | 711,415 |  | 711,415 |  |  | 544,378
Total | $ 711,702 |  | $ 711,702 |  |  | 544,808
Portfolio loans, net | CRE - owner occupied |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 0 | 0 | 0 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0 |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 0 | $ 0 | 0 | $ 0 |  |
Individually evaluated for impairment |  |  |  |  |  | 0
Collectively evaluated for impairment | 3,040 |  | 3,040 |  |  | 2,890
Total | 3,040 |  | 3,040 |  | 2,730 | 2,890
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  |  | 0
Loans - Ending balance: |  |  |  |  |  |
Individually evaluated for impairment | 1,552 |  | 1,552 |  |  | 1,854
Collectively evaluated for impairment | 521,633 |  | 521,633 |  |  | 348,294
Total | $ 523,185 |  | $ 523,185 |  |  | 350,148
Portfolio loans, net | Construction and land development |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 1 | 0 | 1 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 20 | $ 0 | $ 20 |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 0 | $ 20 | 0 | $ 20 |  |
Individually evaluated for impairment |  |  |  |  |  | 155
Collectively evaluated for impairment | 1,164 |  | 1,164 |  |  | 1,149
Total | 1,295 |  | 1,295 |  | 1,302 | 1,304
Impaired Financing Receivable, Related Allowance | 131 |  | 131 |  |  | 155
Loans - Ending balance: |  |  |  |  |  |
Individually evaluated for impairment | 1,489 |  | 1,489 |  |  | 1,903
Collectively evaluated for impairment | 281,737 |  | 281,737 |  |  | 192,639
Total | 283,226 |  | 283,226 |  |  | 194,542
Portfolio loans, net | Residential real estate |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |  | 0
Collectively evaluated for impairment | 2,232 |  | 2,232 |  |  | 2,023
Total | 2,284 |  | 2,284 |  | 2,036 | 2,023
Impaired Financing Receivable, Related Allowance | 52 |  | 52 |  |  | 0
Loans - Ending balance: |  |  |  |  |  |
Individually evaluated for impairment | 1,293 |  | 1,293 |  |  | 62
Collectively evaluated for impairment | 344,602 |  | 344,602 |  |  | 240,698
Total | $ 345,895 |  | $ 345,895 |  |  | 240,760
Portfolio loans, net | Consumer and other |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 0 | 0 | 0 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0 |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | 0 | $ 0 | 0 | $ 0 |  |
Individually evaluated for impairment |  |  |  |  |  | 0
Collectively evaluated for impairment | 912 |  | 912 |  |  | 932
Total | 912 |  | 912 |  | $ 978 | 932
Impaired Financing Receivable, Related Allowance | 0 |  | 0 |  |  | 0
Loans - Ending balance: |  |  |  |  |  |
Individually evaluated for impairment | 9 |  | 9 |  |  | 0
Collectively evaluated for impairment | 150,786 |  | 150,786 |  |  | 155,420
Total | 151,670 |  | 151,670 |  |  | 156,182
Loans and Leases Receivable, Gross | $ 150,795 |  | $ 150,795 |  |  | $ 155,420
Portfolio loans, net | Residential Portfolio Segment [Member] |  |  |  |  |  |
Summary of Recorded Investment in Non-covered Loans by Portfolio Class and Category Based on Impairment Method [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Number of Contracts | loan | 0 | 0 | 0 | 0 |  |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0 |  |
Financing Receivable, Modifications, Pre-Modification Recorded Investment | $ 0 | $ 0 | $ 0 | $ 0 |  |

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible 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 (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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