Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended	12 Months Ended					12 Months Ended		1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Apr. 30, 2010 RMCO Renewals	Dec. 31, 2013 RMCO	Dec. 31, 2010 RMCO Lease Tenant	Dec. 31, 2008 RMCO	Dec. 31, 2012 RMCO	Dec. 31, 2011 RMCO	Dec. 31, 2010 RMCO Minimum sqft	Dec. 31, 2013 RMCO Minimum	Mar. 31, 2011 RMCO Maximum sqft	Dec. 31, 2013 RMCO Maximum sqft	Dec. 31, 2010 RMCO Maximum sqft
Loss Contingencies [Line Items]
Total rent expense net of related to loss on sublease	$ 12,686,000	$ 12,268,000	$ 12,560,000
Operating sublease income	674,000	773,000	1,041,000
Lease initial term				18 years
Renewal of lease period				10 years
Number of renewal periods				2
Percentage of annual base rent						3.00%
Percentage of increase in rent each year				3.00%
Range of subleases in square feet										4,000		20,000	20,000	10,500
Range of subleases initial term										5 years				10 years
Number of retail tenants						2
Renewal options of subleases						renewal options ranging from two 5-year renewal options to nine 5-year renewal options. Anticipated revenue from these subleases exceeds the expected costs that will be incurred by the Company.
Liability related to loss on sublease									1,932,000
Short-term portion of liability					453,000			351,000
Adjustment to sublease loss liability					1,179,000
Long-term portion of liability					1,494,000			972,000
Closed office leases with remaining lease terms							In connection with these office closures, the Company abandoned office leases with remaining lease terms of 11 months to eight years
Number of abandoned leases						4
Total future cash payments					631,000			1,061,000
Percentage of discount rates charged to rent expense											2.75%		18.03%
Self insurance program liability	$ 195,000	$ 360,000