Segment Reporting - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013 Segment	Sep. 30, 2012 Eliminations [Member]	Mar. 31, 2013 Insurance [Member] Operating Segments [Member]	Sep. 30, 2012 Insurance [Member] Operating Segments [Member]	Mar. 31, 2013 Originations [Member] Operating Segments [Member]	Sep. 30, 2012 Originations [Member] Operating Segments [Member]	Mar. 31, 2013 Servicing [Member] Operating Segments [Member]	Sep. 30, 2012 Servicing [Member] Operating Segments [Member]	Sep. 30, 2012 Other [Member] Operating Segments [Member]	Sep. 30, 2012 Asset Receivables Management [Member] Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Number of reportable segments	6
Increase (decrease) to income before taxes			$ 0.2		$ 13.9		$ (14.1)
Increased costs allocated to the segments				29.1		2.9		68.5	234.1
Decreased costs allocated to the segments		$ 333.1								$ 1.5