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Parent Company Only Condensed Financial Information - Schedule of Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income | $ 3,199 | $ 3,253 | $ 3,122 | $ 3,171 | $ 2,270 | $ 2,306 | $ 2,240 | $ 2,712 | $ 12,745 | $ 9,528 | $ 6,179
Investing activities: |  |  |  |  |  |  |  |  |  |  |
Net cash used for investing activities |  |  |  |  |  |  |  |  | (11,904) | (48,496) | (55,790)
Financing activities: |  |  |  |  |  |  |  |  |  |  |
Payment to repurchase preferred stock |  |  |  |  |  |  |  |  |  | (22,857) |
Proceeds from issuance of preferred stock |  |  |  |  |  |  |  |  |  |  | 23,132
Net cash (used for) from financing activities |  |  |  |  |  |  |  |  | 2,534 | 29,282 | 31,202
Increase (decrease) in cash and due from financial institutions |  |  |  |  |  |  |  |  | 5,703 | (4,328) | (11,777)
CBI[Member] |  |  |  |  |  |  |  |  |  |  |
Operating activities: |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 12,745 | 9,528 | 6,179
Adjustment to reconcile net income to net cash from operating activities: |  |  |  |  |  |  |  |  |  |  |
Change in other assets and other liabilities |  |  |  |  |  |  |  |  | 1,324 | 1,508 | (1,620)
Equity in undistributed net earnings of subsidiaries |  |  |  |  |  |  |  |  | (463) | (3,750) | (2,095)
Net cash from operating activities |  |  |  |  |  |  |  |  | 13,606 | 7,286 | 2,464
Investing activities: |  |  |  |  |  |  |  |  |  |  |
Acquisition and additional capitalization of subsidiary, net of cash acquired |  |  |  |  |  |  |  |  | (16,637) |  |
Net cash used for investing activities |  |  |  |  |  |  |  |  | (16,637) |  |
Financing activities: |  |  |  |  |  |  |  |  |  |  |
Payment to repurchase preferred stock |  |  |  |  |  |  |  |  |  | (22,857) |
Proceeds from issuance of preferred stock |  |  |  |  |  |  |  |  |  |  | 23,132
Cash dividends paid |  |  |  |  |  |  |  |  | (3,139) | (3,338) | (2,315)
Net cash (used for) from financing activities |  |  |  |  |  |  |  |  | (3,139) | (26,195) | 20,817
Increase (decrease) in cash and due from financial institutions |  |  |  |  |  |  |  |  | (6,170) | (18,909) | 23,281
Cash and cash equivalents at beginning of year |  |  |  | $ 13,663 |  |  |  | $ 32,572 | 13,663 | 32,572 | 9,291
Cash and cash equivalents at end of year | $ 7,493 |  |  |  | $ 13,663 |  |  |  | $ 7,493 | $ 13,663 | $ 32,572

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