Other Liabilities - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended			3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 Remaining Amount	Dec. 31, 2011 Remaining Amount	Jun. 30, 2012 JFSCI	Jun. 30, 2011 JFSCI	Jun. 30, 2012 JFSCI	Jun. 30, 2011 JFSCI	Dec. 31, 2009 JFSCI	Jun. 30, 2012 JFSCI Remaining Amount	Dec. 31, 2011 JFSCI Remaining Amount	Jun. 30, 2012 PIC	Jun. 30, 2011 PIC	Jun. 30, 2012 PIC	Jun. 30, 2011 PIC	Dec. 31, 2009 PIC	Jun. 30, 2012 PIC Remaining Amount	Jun. 30, 2011 PIC Remaining Amount
Other Liabilities [Line Items]
Insurance receivables	$ 117,129,000		$ 117,129,000		$ 109,390,000
Percentage of uncovered losses related to completed operations	12.50%		12.50%
Deferred revenue on completed operation claims												19,200,000	17,300,000	15,600,000					15,600,000	6,800,000	1,100,000
Deferral recognized as income (expense)	(8,398,000)	786,000	(6,092,000)	2,417,000				(2,300,000)	800,000	(1,700,000)	900,000				(5,900,000)	(1,600,000)	(5,700,000)	(1,500,000)
Distribution payable to non-controlling interest	3,073,000		3,073,000		3,344,000	3,100,000	3,300,000
Distribution to non-controlling interest			$ 345,000	$ 90,000	$ 100,000