Segment Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of reportable segments	3
Operating Revenue	$ 397,168,000	$ 358,101,000
Depreciation, Depletion and Amortization	34,814,000	29,491,000
Income From Continuing Operations	55,274,000	45,227,000
Equity in Earnings of Affiliates, Net of Tax	8,787,000	9,470,000
Net Income From Continuing Operations	34,198,000	28,958,000
Capital Expenditures	27,632,000	20,478,000
Assets	3,007,400,000		3,029,033,000
Data and analytics [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	5,000,000	4,000,000
Segment reporting intercompany expense	900,000	(600,000)
Operating Revenue	161,065,000	147,055,000
Depreciation, Depletion and Amortization	19,552,000	17,746,000
Income From Continuing Operations	24,305,000	23,537,000
Equity in Earnings of Affiliates, Net of Tax	637,000	644,000
Net Income From Continuing Operations	25,099,000	23,883,000
Capital Expenditures	13,160,000	13,794,000
Assets	1,359,933,000		1,375,775,000
Mortgage origination services [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	1,300,000	700,000
Segment reporting intercompany expense	3,900,000	3,800,000
Operating Revenue	176,450,000	141,766,000
Depreciation, Depletion and Amortization	6,669,000	7,080,000
Income From Continuing Operations	50,685,000	31,004,000
Equity in Earnings of Affiliates, Net of Tax	13,447,000	14,856,000
Net Income From Continuing Operations	64,002,000	45,562,000
Capital Expenditures	4,248,000	4,557,000
Assets	1,025,274,000		1,000,382,000
Default services [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	900,000	600,000
Operating Revenue	66,806,000	74,984,000
Depreciation, Depletion and Amortization	673,000	795,000
Income From Continuing Operations	5,503,000	10,417,000
Equity in Earnings of Affiliates, Net of Tax	0	0
Net Income From Continuing Operations	7,010,000	10,491,000
Capital Expenditures	87,000	821,000
Assets	194,222,000		211,515,000
Corporate Level [Member]
Segment Reporting Information [Line Items]
Operating Revenue	167,000	191,000
Depreciation, Depletion and Amortization	7,920,000	3,885,000
Income From Continuing Operations	(25,219,000)	(19,746,000)
Equity in Earnings of Affiliates, Net of Tax	(5,297,000)	(6,030,000)
Net Income From Continuing Operations	(61,913,000)	(50,993,000)
Capital Expenditures		1,306,000
Assets	4,315,031,000		4,344,264,000
Corporate and eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenue	(7,320,000)	(5,895,000)
Depreciation, Depletion and Amortization		(15,000)
Income From Continuing Operations	0	15,000
Equity in Earnings of Affiliates, Net of Tax	0	0
Net Income From Continuing Operations	0	15,000
Capital Expenditures	10,137,000	0
Assets	$ (3,887,060,000)		$ (3,902,903,000)