Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of reportable segments	3		3
Operating Revenue	$ 409,760,000	$ 348,446,000	$ 1,157,222,000	$ 993,149,000
Depreciation and Amortization	33,037,000	34,844,000	93,434,000	84,160,000
Income From Continuing Operations	61,382,000	27,840,000	174,171,000	73,248,000
Equity in Earnings of Affiliates, Net of Tax	8,166,000	8,340,000	29,381,000	20,393,000
Net Income From Continuing Operations	36,163,000	(2,892,000)	106,264,000	59,817,000
Capital Expenditures	22,471,000	17,637,000	62,807,000	53,432,000
Assets	2,954,608,000		2,954,608,000		3,054,555,000
Data and analytics [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	2,200,000	2,900,000	8,500,000	9,900,000
Segment reporting intercompany expense	1,400,000	2,900,000	4,900,000	9,400,000
Operating Revenue	148,953,000	139,813,000	435,893,000	386,875,000
Depreciation and Amortization	17,697,000	22,375,000	53,351,000	48,237,000
Income From Continuing Operations	27,695,000	15,854,000	80,764,000	49,615,000
Equity in Earnings of Affiliates, Net of Tax	489,000	350,000	1,705,000	1,089,000
Net Income From Continuing Operations	29,657,000	15,235,000	83,230,000	50,398,000
Capital Expenditures	14,114,000	10,375,000	42,027,000	31,341,000
Assets	1,257,857,000		1,257,857,000		1,248,436,000
Mortgage origination services [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	700,000	2,400,000	2,100,000	4,200,000
Segment reporting intercompany expense	2,100,000	6,200,000	8,300,000	25,500,000
Operating Revenue	175,120,000	129,176,000	476,944,000	370,512,000
Depreciation and Amortization	6,409,000	6,719,000	21,219,000	17,896,000
Income From Continuing Operations	51,600,000	20,490,000	123,925,000	53,494,000
Equity in Earnings of Affiliates, Net of Tax	12,851,000	13,411,000	46,239,000	32,733,000
Net Income From Continuing Operations	64,366,000	34,534,000	169,705,000	113,302,000
Capital Expenditures	3,679,000	3,668,000	12,533,000	9,213,000
Assets	1,044,557,000		1,044,557,000		1,039,069,000
Default services [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	700,000	300,000	2,100,000	500,000
Segment reporting intercompany expense	100,000	4,200,000	300,000	12,800,000
Operating Revenue	89,364,000	85,106,000	257,995,000	250,371,000
Depreciation and Amortization	799,000	1,292,000	3,406,000	3,952,000
Income From Continuing Operations	16,722,000	12,708,000	46,931,000	39,362,000
Equity in Earnings of Affiliates, Net of Tax	0	(34,000)	0	(129,000)
Net Income From Continuing Operations	16,792,000	12,747,000	47,145,000	38,883,000
Capital Expenditures	1,219,000	1,473,000	3,103,000	3,454,000
Assets	229,631,000		229,631,000		226,034,000
Corporate and eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenue	(3,677,000)	(5,649,000)	(13,610,000)	(14,609,000)
Depreciation and Amortization	8,132,000	4,458,000	15,458,000	14,075,000
Income From Continuing Operations	(34,635,000)	(21,212,000)	(77,449,000)	(69,223,000)
Equity in Earnings of Affiliates, Net of Tax	(5,174,000)	(5,387,000)	(18,563,000)	(13,300,000)
Net Income From Continuing Operations	(74,652,000)	(65,408,000)	(193,816,000)	(142,766,000)
Capital Expenditures	3,459,000	2,121,000	5,144,000	9,424,000
Assets	$ 422,563,000		$ 422,563,000		$ 541,016,000