Goodwill (Details) (USD $)	9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Data and analytics [Member]	Dec. 31, 2012 Data and analytics [Member]	Sep. 30, 2013 Mortgage origination services [Member]	Dec. 31, 2012 Mortgage origination services [Member]	Sep. 30, 2013 Default services [Member]	Dec. 31, 2012 Default services [Member]	Sep. 30, 2013 Fiserv [Member]	Sep. 30, 2013 PIQ Acquisition [Member]	Sep. 30, 2013 Swap [Member]	Sep. 30, 2012 Swap [Member]	Sep. 30, 2013 Swap [Member]	Sep. 30, 2012 Swap [Member]
Goodwill [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax											$ 100,000	$ (300,000)	$ 800,000	$ (800,000)
Goodwill [Roll Forward]
Goodwill		1,511,757,000		708,577,000		653,771,000		149,409,000
Accumulated impairment losses		(7,525,000)		(600,000)		(6,925,000)		0
Goodwill, net	1,534,966,000	1,504,232,000	709,769,000	707,977,000	675,788,000	646,846,000	149,409,000	149,409,000	600,000	15,500,000
Acquisitions	44,996,000		16,054,000		28,942,000		0
Translation adjustments	(14,459,000)		(14,459,000)		0		0
Goodwill, Other Changes	197,000		(197,000)		0		0
Goodwill, net	$ 1,534,966,000	$ 1,504,232,000	$ 709,769,000	$ 707,977,000	$ 675,788,000	$ 646,846,000	$ 149,409,000	$ 149,409,000	$ 600,000	$ 15,500,000