Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Segment Reporting Information [Line Items]
Number of Reportable Segments	3		3
Operating Revenues	$ 389,361,000	$ 328,421,000	$ 747,462,000	$ 644,703,000
Depreciation and amortization	30,905,000	26,278,000	60,396,000	49,315,000
Operating Income (Loss)	67,562,000	18,833,000	112,789,000	45,409,000
Equity in earnings of affiliates, net of tax	11,745,000	5,719,000	21,215,000	12,053,000
Net income from continuing operations	41,143,000	40,289,000	70,101,000	62,710,000
Capital Expenditures	19,858,000	19,813,000	40,336,000	35,832,000
Assets	3,043,343,000		3,043,343,000		3,054,555,000
Data and Analytics [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue	2,200,000	2,800,000	6,200,000	7,000,000
Segment Reporting Intercompany Expense	1,900,000	3,300,000	3,500,000	6,500,000
Operating Revenues	145,805,000	129,700,000	286,940,000	247,061,000
Depreciation and amortization	18,246,000	14,128,000	35,654,000	25,862,000
Operating Income (Loss)	30,946,000	16,755,000	53,069,000	33,761,000
Equity in earnings of affiliates, net of tax	571,000	(474,000)	1,215,000	739,000
Net income from continuing operations	31,103,000	16,364,000	53,572,000	35,162,000
Capital Expenditures	14,119,000	12,098,000	27,913,000	20,966,000
Assets	1,249,640,000		1,249,640,000		1,248,436,000
Mortgage Origination Services [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue	800,000	700,000	1,500,000	1,800,000
Segment Reporting Intercompany Expense	2,200,000	9,000,000	6,200,000	19,300,000
Operating Revenues	154,139,000	119,925,000	301,825,000	241,336,000
Depreciation and amortization	7,392,000	6,039,000	14,810,000	11,177,000
Operating Income (Loss)	39,908,000	15,442,000	72,325,000	33,005,000
Equity in earnings of affiliates, net of tax	18,533,000	10,029,000	33,388,000	19,323,000
Net income from continuing operations	58,364,000	26,167,000	105,339,000	78,769,000
Capital Expenditures	4,297,000	3,365,000	8,854,000	5,545,000
Assets	1,033,715,000		1,033,715,000		1,039,069,000
Default Services [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue	800,000	100,000	1,400,000	100,000
Segment Reporting Intercompany Expense	100,000	4,300,000	200,000	8,600,000
Operating Revenues	93,646,000	82,201,000	168,630,000	165,265,000
Depreciation and amortization	1,811,000	1,342,000	2,606,000	2,659,000
Operating Income (Loss)	19,790,000	12,008,000	30,209,000	26,655,000
Equity in earnings of affiliates, net of tax	0	(78,000)	0	(96,000)
Net income from continuing operations	19,860,000	11,981,000	30,353,000	26,136,000
Capital Expenditures	1,063,000	1,372,000	1,884,000	1,981,000
Assets	222,761,000		222,761,000		226,034,000
Corporate Elimination [Member]
Segment Reporting Information [Line Items]
Operating Revenues	(4,229,000)	(3,405,000)	(9,933,000)	(8,959,000)
Depreciation and amortization	3,456,000	4,769,000	7,326,000	9,617,000
Operating Income (Loss)	(23,082,000)	(25,372,000)	(42,814,000)	(48,012,000)
Equity in earnings of affiliates, net of tax	(7,359,000)	(3,758,000)	(13,388,000)	(7,913,000)
Net income from continuing operations	(68,184,000)	(14,223,000)	(119,163,000)	(77,357,000)
Capital Expenditures	379,000	2,978,000	1,685,000	7,340,000
Assets	$ 537,227,000		$ 537,227,000		$ 541,016,000