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Fair Value Measurements - Schedule of Estimated Fair Values of Financial Instruments Not Recorded at Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Estimated fair value | Securities held to maturity |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | $ 42,218 | $ 43,441
Estimated fair value | Portfolio loans, net |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 3,045,230 | 2,782,704
Estimated fair value | State tax credits, held for sale |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 44,158 | 43,647
Estimated fair value | Deposits |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 3,126,534 | 2,784,654
Estimated fair value | Subordinated debentures |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 36,275 | 35,432
Estimated fair value | Federal Home Loan Bank advances |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 128,996 | 109,994
Estimated fair value | Other Borrowings |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 189,996 | 270,286
Level 1 | Securities held to maturity |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 0 | 0
Level 1 | Portfolio loans, net |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 0 | 0
Level 1 | State tax credits, held for sale |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 0 | 0
Level 1 | Deposits |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 2,636,980 | 2,428,403
Level 1 | Subordinated debentures |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 0 | 0
Level 1 | Federal Home Loan Bank advances |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 0 | 0
Level 1 | Other Borrowings |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 0 | 0
Level 2 | Securities held to maturity |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 42,218 | 43,441
Level 2 | Portfolio loans, net |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 0 | 0
Level 2 | State tax credits, held for sale |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 0 | 0
Level 2 | Deposits |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 0 | 0
Level 2 | Subordinated debentures |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 36,275 | 35,432
Level 2 | Federal Home Loan Bank advances |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 128,996 | 109,994
Level 2 | Other Borrowings |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 189,996 | 270,286
Level 3 | Securities held to maturity |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 0 | 0
Level 3 | Portfolio loans, net |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 3,045,230 | 2,782,704
Level 3 | State tax credits, held for sale |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial assets not on condensed consolidated balance sheets at fair value | 44,158 | 43,647
Level 3 | Deposits |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 489,554 | 356,251
Level 3 | Subordinated debentures |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 0 | 0
Level 3 | Federal Home Loan Bank advances |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | 0 | 0
Level 3 | Other Borrowings |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Financial liabilities not on condensed consolidated balance sheets at fair value | $ 0 | $ 0

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