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, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Net operating loss carryforwards .	$ 884	$ 952
Allowance for doubtful accounts	4,486	4,569
Employee benefits and compensation	29,166	27,984
Lease costs	2,772	3,318
State tax credit carryforwards	1,489	1,393
Other deferred tax assets	2,951	2,497
Total gross deferred tax assets	41,748	40,713
Less: valuation allowance	(1,314)	(1,376)
Total deferred tax assets, net	40,434	39,337
Accrued interest	2,494	3,847
Client list intangible assets	2,717	3,273
Goodwill and other intangibles	38,646	32,114
Other deferred tax liabilities	122	209
Total gross deferred tax liabilities	43,979	39,443
Net deferred tax (liability) asset	$ (3,545)	$ (106)