Commitments and Contingencies - Additional Information (Detail)	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Number of RMBS Trustees Filing Suit			3
Number of Cash Claim Payments by Ambac Assurance			2
Gain (Loss) Related to Litigation Settlement			$ 7,760,000
Ambac [Member]
Loss Contingencies [Line Items]
Premium Income Due From Summary Judgment			2,700
Ambac Assurance [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value			800,000
Litigation settlement amount			7,760,000
Successor [Member]
Loss Contingencies [Line Items]
Operating Leases, Rent Expense		$ 3,422,000	5,746,000	$ 5,588,000
Operating Leases, Future Minimum Payments Due, Next Twelve Months			6,529,000
Operating Leases, Future Minimum Payments, Due in Two Years			6,944,000
Operating Leases, Future Minimum Payments, Due in Three Years			6,964,000
Operating Leases, Future Minimum Payments, Due in Four Years			5,691,000
Operating Leases, Future Minimum Payments, Due in Five Years			1,935,000
Operating Leases, Future Minimum Payments, Due Thereafter			15,613,000
Operating Leases, Future Minimum Payments Due			$ 43,676,000
Predecessor [Member]
Loss Contingencies [Line Items]
Operating Leases, Rent Expense	$ 1,871,000
Contra Costa Complaint [Member]
Loss Contingencies [Line Items]
Number of California Municipal Entities			5
Alameda Complaint [Member]
Loss Contingencies [Line Items]
Number of California Municipal Entities			19
Olympic Club Complaint [Member]
Loss Contingencies [Line Items]
Number of Olympic Club Actions			3