Fair Value of Financial Instruments - Presentation of Financial Instruments Carried at Fair Value by Valuation Hierarchy (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	$ 44,998	$ 86,740
Recurring Basis
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	354,116	301,349
Financial liabilities	2,177	188
Recurring Basis | Interest rate swap contacts | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	2,081
Recurring Basis | Interest rate swap contacts | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	2,081
Recurring Basis | Loans held for sale
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	10,323	6,594
Recurring Basis | Interest rate lock commitments | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	189	154
Recurring Basis | Interest rate lock commitments | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	6	14
Recurring Basis | Forward contracts to sell mortgage loans | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets		2
Recurring Basis | Forward contracts to sell mortgage loans | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	90	174
Recurring Basis | Investment securities available-for-sale | U.S. government sponsored and federal agency obligations
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	3,136	3,261
Recurring Basis | Investment securities available-for-sale | Mortgage backed securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	338,384	291,335
Recurring Basis | Investment securities available-for-sale | Other securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	3	3
Level 1
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 1 | Recurring Basis
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	3	3
Financial liabilities	0	0
Level 1 | Recurring Basis | Interest rate swap contacts | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0
Level 1 | Recurring Basis | Interest rate swap contacts | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	0
Level 1 | Recurring Basis | Loans held for sale
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 1 | Recurring Basis | Interest rate lock commitments | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 1 | Recurring Basis | Interest rate lock commitments | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	0	0
Level 1 | Recurring Basis | Forward contracts to sell mortgage loans | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets		0
Level 1 | Recurring Basis | Forward contracts to sell mortgage loans | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	0	0
Level 1 | Recurring Basis | Investment securities available-for-sale | U.S. government sponsored and federal agency obligations
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 1 | Recurring Basis | Investment securities available-for-sale | Mortgage backed securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 1 | Recurring Basis | Investment securities available-for-sale | Other securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	3	3
Level 2
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 2 | Recurring Basis
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	354,113	301,346
Financial liabilities	2,177	188
Level 2 | Recurring Basis | Interest rate swap contacts | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	2,081
Level 2 | Recurring Basis | Interest rate swap contacts | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	2,081
Level 2 | Recurring Basis | Loans held for sale
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	10,323	6,594
Level 2 | Recurring Basis | Interest rate lock commitments | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	189	154
Level 2 | Recurring Basis | Interest rate lock commitments | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	6	14
Level 2 | Recurring Basis | Forward contracts to sell mortgage loans | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets		2
Level 2 | Recurring Basis | Forward contracts to sell mortgage loans | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	90	174
Level 2 | Recurring Basis | Investment securities available-for-sale | U.S. government sponsored and federal agency obligations
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	3,136	3,261
Level 2 | Recurring Basis | Investment securities available-for-sale | Mortgage backed securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	338,384	291,335
Level 2 | Recurring Basis | Investment securities available-for-sale | Other securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 3
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	44,998	86,740
Level 3 | Recurring Basis
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Financial liabilities	0	0
Level 3 | Recurring Basis | Interest rate swap contacts | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0
Level 3 | Recurring Basis | Interest rate swap contacts | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	0
Level 3 | Recurring Basis | Loans held for sale
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 3 | Recurring Basis | Interest rate lock commitments | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 3 | Recurring Basis | Interest rate lock commitments | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	0	0
Level 3 | Recurring Basis | Forward contracts to sell mortgage loans | Other assets
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets		0
Level 3 | Recurring Basis | Forward contracts to sell mortgage loans | Other liabilities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial liabilities	0	0
Level 3 | Recurring Basis | Investment securities available-for-sale | U.S. government sponsored and federal agency obligations
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 3 | Recurring Basis | Investment securities available-for-sale | Mortgage backed securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	0	0
Level 3 | Recurring Basis | Investment securities available-for-sale | Other securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Financial assets	$ 0	$ 0