Business and Basis of Presentation - Additional Information (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Segment $ / shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of Reportable Segments | Segment	3
Decrease in total assets	$ (16,458,970)	$ (18,549,447)
Decrease in total liabilities	(16,483,410)	(17,744,771)
Decrease in receivables, net	0	(12,845)
Increase in servicer and protective advances net	1,254,343	1,707,372
Decrease in payables and accrued liabilities	(5,452)	(21,356)
Cash flows from change in receivables decreased	(81,695)	(4,196)	$ 67,416
Cash flows from change in servicer and protective advances increased	(380,298)	(135,831)	289,464
Cash flows from change in payables and accrued liabilities increased	(24,429)	5,936	67,018
Decrease In Income tax Benefit	$ 1,400
Decrease in Effective Tax Rate	1.00%
Increase in diluted loss per share | $ / shares	$ 0.10
Restatement Adjustment [Member] | Insurance Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Decrease in total assets		42,100
Decrease in total liabilities		42,100
Decrease in receivables, net		77,200
Increase in servicer and protective advances net		35,200
Decrease in payables and accrued liabilities		42,100
Cash flows from change in receivables decreased		6,800	3,100
Cash flows from change in servicer and protective advances increased		1,900	1,900
Cash flows from change in payables and accrued liabilities increased		$ 4,900	$ 1,200