Loss Reserves - Default Inventory Reconciliation (Details) - loan	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Primary Default Inventory [Roll Forward]
Default inventory at beginning of year	79,901	103,328	139,845
New Notices	74,315	88,844	106,823
Cures	(73,610)	(87,278)	(104,390)
Paids (including those charged to a deductible or captive)	(16,004)	(23,494)	(34,738)
Rescissions and denials	(848)	(1,306)	(1,939)
Items removed from inventory resulting from settlements	(1,121)	(193)	(2,273)
Default inventory at end of year	62,633	79,901	103,328