Accrued Expenses and Other Liabilities (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accrued Expenses And Other Liabilities [Line Items]
Accrued compensation and benefits	$ 19,943,000	$ 16,818,000
Accrued rent and vendor expenses	16,972,000	11,554,000
Accrued bonuses	12,668,000	47,585,000
Reserve for policy cancellations	7,174,000	6,396,000
Accrued interest	3,295,000	3,288,000
Other	19,541,000	15,224,000
Total	$ 79,593,000	$ 100,865,000