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Income Taxes - Tax Effects of Temporary Differences That Rises to Significant Portions of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Income Tax Disclosure [Abstract] |  |
Net operating loss carryforwards | $ 952 | $ 973
Allowance for doubtful accounts | 4,569 | 3,028
Employee benefits and compensation | 27,984 | 25,238
Lease costs | 3,318 | 3,959
State tax credit carryforwards | 1,393 | 1,496
Other deferred tax assets | 2,497 | 3,175
Total gross deferred tax assets | 40,713 | 37,869
Less: valuation allowance | (1,376) | (1,079)
Total deferred tax assets, net | 39,337 | 36,790
Accrued interest | 3,847 | 5,878
Client list intangible assets | 3,273 | 4,016
Goodwill and other intangibles | 32,114 | 25,874
Other deferred tax liabilities | 209 | 248
Total gross deferred tax liabilities | 39,443 | 36,016
Net deferred tax liability | $ (106) |
Net deferred tax asset |  | $ 774

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