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Significant Components of Current Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets [Line Items]
Deferred profit-sharing contingent commissions	$ 9,490	$ 11,124
Net operating loss carryforwards	5,786
Accruals and reserves	9,132	8,739
Total current deferred tax assets	$ 24,408	$ 19,863

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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