Schedule of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of Accrued Liabilities [Line Items]
Other taxes	$ 3,242	$ 2,759
Restructuring	416	626
Professional fees	778	1,146
Income taxes	1,178	1,954
Professional services partners fees	490	120
Short-term deferred rent	1,675	1,428
Self-insurance health and dental claims	1,119	1,931
Dividends payable	1,137	1,132
Employee reimbursable expenses	1,923	897
Construction in process	2,081
Other	7,558	6,343
Total accrued expenses	$ 21,597	$ 18,336