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Disclosures About Fair Value of Financial Instruments - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Related Allowance | $ 380 | $ 845
Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 2,174,604 | 2,086,632
Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 13,449 | 11,497
Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 1,720 |
Derivative assets | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 14,665 | 14,693
Loans held for sale - fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 1,602 | 1,507
Loans receivable, mortgage warehouse – fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 1,480,195 | 1,405,420
Derivative liabilities | Fair Value, Measurements, Recurring |  |
Liabilities |  |
Financial Liabilities Fair Value Disclosure | 23,837 | 16,286
Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 12,668 | 10,876
Other real estate owned | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 781 | 621
Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 304,144 | 305,374
Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 372,278 | 357,920
Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure |  | 1,718
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 1,720 | 1,718
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 1,720 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative assets | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans held for sale - fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans receivable, mortgage warehouse – fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative liabilities | Fair Value, Measurements, Recurring |  |
Liabilities |  |
Financial Liabilities Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other real estate owned | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure |  | 1,718
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 2,172,807 | 2,084,845
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Significant Other Observable Inputs (Level 2) | Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 |
Significant Other Observable Inputs (Level 2) | Derivative assets | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 14,588 | 14,624
Significant Other Observable Inputs (Level 2) | Loans held for sale - fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 1,602 | 1,507
Significant Other Observable Inputs (Level 2) | Loans receivable, mortgage warehouse – fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 1,480,195 | 1,405,420
Significant Other Observable Inputs (Level 2) | Derivative liabilities | Fair Value, Measurements, Recurring |  |
Liabilities |  |
Financial Liabilities Fair Value Disclosure | 23,837 | 16,286
Significant Other Observable Inputs (Level 2) | Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Significant Other Observable Inputs (Level 2) | Other real estate owned | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 304,144 | 305,374
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 372,278 | 357,920
Significant Other Observable Inputs (Level 2) | Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure |  | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 77 | 69
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 13,449 | 11,497
Significant Unobservable Inputs (Level 3) | Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 |
Significant Unobservable Inputs (Level 3) | Derivative assets | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 77 | 69
Significant Unobservable Inputs (Level 3) | Loans held for sale - fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Significant Unobservable Inputs (Level 3) | Loans receivable, mortgage warehouse – fair value option | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Significant Unobservable Inputs (Level 3) | Derivative liabilities | Fair Value, Measurements, Recurring |  |
Liabilities |  |
Financial Liabilities Fair Value Disclosure | 0 | 0
Significant Unobservable Inputs (Level 3) | Impaired loans, net of specific reserves | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 12,668 | 10,876
Significant Unobservable Inputs (Level 3) | Other real estate owned | Fair Value, Measurements, Nonrecurring |  |
Assets |  |
Assets, Fair Value Disclosure | 781 | 621
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Agency-guaranteed residential mortgage-backed securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | 0 | 0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Corporate notes | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure | $ 0 | 0
Significant Unobservable Inputs (Level 3) | Available-for-sale Securities | Equity securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Assets, Fair Value Disclosure |  | $ 0

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- Definition Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities. + References No definition available. + Details
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