Notes Payable - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Principal outstanding amounts of notes	$ 21,743,000	$ 31,220,000
Principal payments	10,395,000	78,890,000	$ 36,294,000
Cash interest paid on Notes	2,887,000	18,272,000	9,707,000
Maximum [Member]
Debt Instrument [Line Items]
Collateral Account used for future payments	1,000	2,400,000	100,000
PIK Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	19,400,000	18,500,000	13,900,000
Runoff Notes [Member]
Debt Instrument [Line Items]
Principal outstanding amounts of notes	21,700,000	31,200,000	105,500,000
13% Senior First Lien Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	$ 110,000,000
Notes maturity date	Mar. 19, 2030
Principal payments	$ 10,400,000	78,900,000	36,300,000
13% Senior Second Lien Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	$ 20,000,000
Notes maturity date	Mar. 19, 2030
Principal payments from restricted cash	$ 9,000,000
13% Senior First And Second Lien Notes [Member]
Debt Instrument [Line Items]
Cash interest paid on Notes	$ 2,900,000	$ 5,200,000	$ 9,700,000