Segment Financial Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Statement [Abstract]
Operating Revenues	$ 345,398,000	$ 348,446,000	$ 328,421,000	$ 316,282,000	$ 315,367,000	$ 330,146,000	$ 326,007,000	$ 308,756,000	$ 1,338,547,000	$ 1,280,276,000	$ 1,330,162,000
Depreciation and Amortization									115,546,000	94,881,000	114,374,000
Income from operations	15,436,000	27,840,000	18,833,000	26,576,000	33,199,000	45,692,000	21,624,000	13,168,000	88,685,000	113,683,000	108,652,000
Equity in earnings of affiliates	9,877,000	8,340,000	5,719,000	6,334,000	12,049,000	13,507,000	8,562,000	7,523,000	30,270,000	41,641,000	48,847,000
Income from continuing operations, net of tax									53,495,000	83,891,000	103,619,000
Capital Expenditures									45,215,000	52,610,000	31,887,000
Statement of Financial Position [Abstract]
Investments in affiliates	113,809,000				165,709,000				113,809,000	165,709,000
Long-Lived Assets	2,454,092,000				2,182,524,000				2,454,092,000	2,182,524,000
Total assets	3,054,555,000				2,964,532,000				3,054,555,000	2,964,532,000
Domestic Country [Member]
Income Statement [Abstract]
Operating Revenues									1,239,674,000	1,220,665,000	1,263,322,000
Statement of Financial Position [Abstract]
Long-Lived Assets	1,601,717,000				2,168,149,000				1,601,717,000	2,168,149,000
Foreign Country [Member]
Income Statement [Abstract]
Operating Revenues									98,873,000	59,611,000	66,840,000
Statement of Financial Position [Abstract]
Long-Lived Assets	852,375,000				14,375,000				852,375,000	14,375,000
Data and Analytics [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue									13,100,000	14,000,000	20,600,000
Segment Reporting Intercompany Expense									11,200,000	10,800,000	9,200,000
Income Statement [Abstract]
Operating Revenues									525,350,000	444,690,000	436,458,000
Depreciation and Amortization									65,957,000	47,459,000	47,919,000
Income from operations									69,713,000	85,073,000	105,812,000
Equity in earnings of affiliates									1,512,000	4,606,000	638,000
Income from continuing operations, net of tax									70,039,000	89,658,000	107,233,000
Capital Expenditures									16,808,000	9,378,000	11,593,000
Statement of Financial Position [Abstract]
Investments in affiliates	24,398,000				73,108,000				24,398,000	73,108,000
Long-Lived Assets	1,141,749,000				877,715,000				1,141,749,000	877,715,000
Total assets	1,248,436,000				972,562,000				1,248,436,000	972,562,000
Data and Analytics [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating Revenues									468,022,000	438,359,000	431,214,000
Statement of Financial Position [Abstract]
Long-Lived Assets	787,901,000				867,088,000				787,901,000	867,088,000
Data and Analytics [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating Revenues									57,328,000	6,331,000	5,244,000
Statement of Financial Position [Abstract]
Long-Lived Assets	353,848,000				10,627,000				353,848,000	10,627,000
Mortgage Origination Services [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue									6,600,000	3,000,000	3,300,000
Segment Reporting Intercompany Expense									28,100,000	31,100,000	19,000,000
Income Statement [Abstract]
Operating Revenues									504,872,000	484,940,000	518,882,000
Depreciation and Amortization									23,782,000	19,108,000	21,390,000
Income from operations									77,567,000	85,960,000	101,027,000
Equity in earnings of affiliates									47,673,000	64,588,000	77,075,000
Income from continuing operations, net of tax									126,616,000	150,855,000	178,245,000
Capital Expenditures									12,242,000	8,698,000	11,003,000
Statement of Financial Position [Abstract]
Investments in affiliates	79,538,000				66,019,000				79,538,000	66,019,000
Long-Lived Assets	929,116,000				862,004,000				929,116,000	862,004,000
Total assets	1,039,069,000				994,124,000				1,039,069,000	994,124,000
Mortgage Origination Services [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating Revenues									504,633,000	484,888,000	518,882,000
Statement of Financial Position [Abstract]
Long-Lived Assets	929,075,000				861,901,000				929,075,000	861,901,000
Mortgage Origination Services [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating Revenues									239,000	52,000	0
Statement of Financial Position [Abstract]
Long-Lived Assets	41,000				103,000				41,000	103,000
Default Services [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue									900,000	2,300,000	3,500,000
Segment Reporting Intercompany Expense									14,800,000	16,000,000	17,800,000
Income Statement [Abstract]
Operating Revenues									329,273,000	368,536,000	360,638,000
Depreciation and Amortization									7,484,000	5,446,000	6,313,000
Income from operations									45,086,000	77,206,000	60,905,000
Equity in earnings of affiliates									(245,000)	755,000	586,000
Income from continuing operations, net of tax									44,310,000	81,311,000	61,478,000
Capital Expenditures									4,062,000	2,658,000	984,000
Statement of Financial Position [Abstract]
Investments in affiliates	0				0				0	0
Long-Lived Assets	177,122,000				181,441,000				177,122,000	181,441,000
Total assets	226,034,000				230,142,000				226,034,000	230,142,000
Default Services [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating Revenues									329,273,000	368,536,000	360,638,000
Statement of Financial Position [Abstract]
Long-Lived Assets	177,122,000				181,441,000				177,122,000	181,441,000
Default Services [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating Revenues									0	0	0
Statement of Financial Position [Abstract]
Long-Lived Assets	0				0				0	0
Corporate Elimination [Member]
Income Statement [Abstract]
Operating Revenues									(20,948,000)	(17,890,000)	14,184,000
Depreciation and Amortization									18,323,000	22,868,000	38,752,000
Income from operations									(103,681,000)	(134,556,000)	(159,092,000)
Equity in earnings of affiliates									(18,670,000)	(28,308,000)	(29,452,000)
Income from continuing operations, net of tax									(187,470,000)	(237,933,000)	(243,337,000)
Capital Expenditures									12,103,000	31,876,000	8,307,000
Statement of Financial Position [Abstract]
Investments in affiliates	9,873,000				26,582,000				9,873,000	26,582,000
Long-Lived Assets	206,105,000				261,364,000				206,105,000	261,364,000
Total assets	541,016,000				767,704,000				541,016,000	767,704,000
Corporate Elimination [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating Revenues									(62,254,000)	(71,118,000)	(47,412,000)
Statement of Financial Position [Abstract]
Long-Lived Assets	(292,381,000)				257,719,000				(292,381,000)	257,719,000
Corporate Elimination [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating Revenues									41,306,000	53,228,000	61,596,000
Statement of Financial Position [Abstract]
Long-Lived Assets	$ 498,486,000				$ 3,645,000				$ 498,486,000	$ 3,645,000