Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of reportable segments			3
Operating Revenue	$ 426,972,000	$ 389,361,000	$ 824,141,000	$ 747,462,000
Depreciation, Depletion and Amortization	34,824,000	30,905,000	69,638,000	60,397,000
Income From Continuing Operations	68,386,000	67,562,000	123,662,000	112,789,000
Equity in Earnings of Affiliates, Net of Tax	9,345,000	11,745,000	18,132,000	21,215,000
Net Income From Continuing Operations	44,860,000	41,143,000	79,059,000	70,101,000
Capital Expenditures	25,968,000	19,858,000	53,600,000	40,336,000
Assets	3,023,168,000		3,023,168,000		3,029,033,000
Data and analytics [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	3,600,000	2,200,000	8,500,000	6,200,000
Segment reporting intercompany expense	1,100,000	800,000	2,000,000	(1,400,000)
Operating Revenue	168,974,000	151,896,000	330,039,000	298,951,000
Depreciation, Depletion and Amortization	19,176,000	18,676,000	38,728,000	36,421,000
Income From Continuing Operations	31,244,000	32,735,000	55,550,000	56,272,000
Equity in Earnings of Affiliates, Net of Tax	546,000	572,000	1,183,000	1,215,000
Net Income From Continuing Operations	31,923,000	32,894,000	57,023,000	56,776,000
Capital Expenditures	13,799,000	14,119,000	26,959,000	27,913,000
Assets	1,325,344,000		1,325,344,000		1,375,775,000
Mortgage origination services [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	1,600,000	800,000	2,900,000	1,500,000
Segment reporting intercompany expense	3,000,000	2,100,000	6,900,000	5,900,000
Operating Revenue	184,432,000	148,048,000	360,883,000	289,814,000
Depreciation, Depletion and Amortization	7,244,000	6,962,000	13,913,000	14,043,000
Income From Continuing Operations	49,006,000	38,119,000	99,692,000	69,122,000
Equity in Earnings of Affiliates, Net of Tax	14,415,000	18,533,000	27,862,000	33,388,000
Net Income From Continuing Operations	63,285,000	56,575,000	127,288,000	102,135,000
Capital Expenditures	3,570,000	4,297,000	7,818,000	8,854,000
Assets	1,017,562,000		1,017,562,000		1,000,382,000
Default services [Member]
Segment Reporting Information [Line Items]
Segment reporting intercompany revenue	1,300,000	800,000	2,200,000	1,500,000
Operating Revenue	80,050,000	93,646,000	146,856,000	168,630,000
Depreciation, Depletion and Amortization	670,000	1,811,000	1,343,000	2,606,000
Income From Continuing Operations	17,947,000	19,790,000	23,451,000	30,209,000
Equity in Earnings of Affiliates, Net of Tax	0	0	0	0
Net Income From Continuing Operations	17,951,000	19,860,000	24,961,000	30,353,000
Capital Expenditures	168,000	1,063,000	255,000	1,884,000
Assets	193,812,000		193,812,000		211,515,000
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Operating Revenue	179,000	151,000	346,000	342,000
Depreciation, Depletion and Amortization	7,734,000	3,576,000	15,654,000	7,462,000
Income From Continuing Operations	(29,811,000)	(23,202,000)	(55,031,000)	(42,949,000)
Equity in Earnings of Affiliates, Net of Tax	(5,616,000)	(7,360,000)	(10,913,000)	(13,388,000)
Net Income From Continuing Operations	(68,299,000)	(68,306,000)	(130,213,000)
Capital Expenditures		379,000
Corporate Level [Member]
Segment Reporting Information [Line Items]
Net Income From Continuing Operations				(119,298,000)
Capital Expenditures	8,431,000		18,568,000	1,685,000
Assets	4,501,099,000		4,501,099,000		4,344,263,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenue	(6,663,000)	(4,380,000)	(13,983,000)	(10,275,000)
Depreciation, Depletion and Amortization	0	(120,000)	0	(135,000)
Income From Continuing Operations	0	120,000	0	135,000
Equity in Earnings of Affiliates, Net of Tax	0	0	0	0
Net Income From Continuing Operations	0	120,000	0	135,000
Interest Rate Swap Unrealized Gain Loss		0
Capital Expenditures	0		0	0
Assets	$ (4,014,649,000)		$ (4,014,649,000)		$ (3,902,902,000)