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Income Taxes - Schedule of Components of Income Tax Expense (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
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| Income Tax Disclosure [Abstract] | |||
| Current | $ 2,607 | $ 409 | $ 71 |
| Deferred | 28 | 550 | (240) |
| Expense of operating loss carryforwards | 536 | 1,351 | 1,240 |
| Change in valuation allowance | (12) | ||
| Income tax expense | $ 3,159 | $ 2,310 | $ 1,071 |