Schedule of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accrued expenses
Partner commissions	$ 4,349	$ 1,723
Other taxes	3,120	2,711
Employee reimbursable expenses	2,255	879
Dividends payable	1,140
Professional services contractor fees	1,660	602
Self-insurance health and dental claims	977	1,707
Professional fees	930	811
Short-term deferred rent	783	1,111
Foreign income taxes payable	649	1,167
Acquisition-related costs	482
Restructuring	113	441
Other	4,283	4,382
Total accrued expenses	$ 20,741	$ 15,534