Segment Financial Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2012 segment	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012 segment	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Number of reportable segments	3								3
Income Statement [Abstract]
Operating revenue	$ 410,411,000	$ 409,760,000	$ 389,361,000	$ 358,101,000	$ 345,398,000	$ 348,446,000	$ 328,421,000	$ 316,282,000	$ 1,567,633,000	$ 1,338,547,000	$ 1,280,276,000
Depreciation and amortization									133,714,000	115,546,000	94,881,000
Operating income/(loss)	48,089,000	61,382,000	67,562,000	45,227,000	15,436,000	27,840,000	18,833,000	26,576,000	222,260,000	88,685,000	113,683,000
Equity in earnings of affiliates, net of tax	6,602,000	8,166,000	11,745,000	9,470,000	9,877,000	8,340,000	5,719,000	6,334,000	35,983,000	30,270,000	41,641,000
Net income/(loss) from continuing operations									122,863,000	53,495,000	83,891,000
Capital expenditures									84,480,000	72,224,000	77,424,000
Statement of Financial Position [Abstract]
Investment in affiliates, net	94,227,000				113,809,000				94,227,000	113,809,000
Long-lived assets	2,439,903,000				2,415,787,000				2,439,903,000	2,415,787,000
Total assets	3,029,033,000				3,063,184,000				3,029,033,000	3,063,184,000
Domestic Country [Member]
Income Statement [Abstract]
Operating revenue									1,476,334,000	1,239,674,000	1,220,664,000
Statement of Financial Position [Abstract]
Long-lived assets	2,088,682,000				2,061,868,000				2,088,682,000	2,061,868,000
Foreign Country [Member]
Income Statement [Abstract]
Operating revenue									91,299,000	98,873,000	59,612,000
Statement of Financial Position [Abstract]
Long-lived assets	351,221,000				353,919,000				351,221,000	353,919,000
Data and Analytics [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue									12,400,000	13,400,000	14,000,000
Segment Reporting Intercompany Expense									(2,900,000)	(1,800,000)	(10,800,000)
Income Statement [Abstract]
Operating revenue									616,110,000	548,146,000	463,513,000
Depreciation and amortization									72,391,000	67,230,000	48,722,000
Operating income/(loss)									109,023,000	75,437,000	88,260,000
Equity in earnings of affiliates, net of tax									2,197,000	1,512,000	4,606,000
Net income/(loss) from continuing operations									112,155,000	75,763,000	92,853,000
Capital expenditures									54,845,000	43,506,000	33,819,000
Statement of Financial Position [Abstract]
Investment in affiliates, net	14,206,000				24,398,000				14,206,000	24,398,000
Long-lived assets	1,229,973,000				1,175,596,000				1,229,973,000	1,175,596,000
Total assets	1,375,775,000				1,283,568,000				1,375,775,000	1,283,568,000
Data and Analytics [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating revenue									525,691,000	490,817,000	457,182,000
Statement of Financial Position [Abstract]
Long-lived assets	878,783,000				821,748,000				878,783,000	821,748,000
Data and Analytics [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating revenue									90,419,000	57,329,000	6,331,000
Statement of Financial Position [Abstract]
Long-lived assets	351,190,000				353,848,000				351,190,000	353,848,000
Mortgage Origination Services [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue									3,100,000	6,400,000	3,000,000
Segment Reporting Intercompany Expense									(11,600,000)	(10,000,000)	(31,100,000)
Income Statement [Abstract]
Operating revenue									635,615,000	482,076,000	466,117,000
Depreciation and amortization									26,013,000	22,510,000	17,844,000
Operating income/(loss)									171,495,000	71,842,000	82,775,000
Equity in earnings of affiliates, net of tax									55,571,000	47,673,000	64,588,000
Net income/(loss) from continuing operations									226,738,000	120,891,000	147,663,000
Capital expenditures									14,739,000	12,528,000	8,698,000
Statement of Financial Position [Abstract]
Investment in affiliates, net	72,977,000				79,538,000				72,977,000	79,538,000
Long-lived assets	876,765,000				895,268,000				876,765,000	895,268,000
Total assets	1,000,382,000				1,003,937,000				1,000,382,000	1,003,937,000
Mortgage Origination Services [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating revenue									635,375,000	481,837,000	466,065,000
Statement of Financial Position [Abstract]
Long-lived assets	876,761,000				895,227,000				876,761,000	895,227,000
Mortgage Origination Services [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating revenue									240,000	239,000	52,000
Statement of Financial Position [Abstract]
Long-lived assets	4,000				41,000				4,000	41,000
Asset Management and Processing Solutions [Member]
Segment Reporting Information [Line Items]
Segment Reporting Intercompany Revenue									3,000,000	900,000	2,300,000
Segment Reporting Intercompany Expense									0	(3,900,000)	(16,000,000)
Income Statement [Abstract]
Operating revenue									335,224,000	329,273,000	368,536,000
Depreciation and amortization									11,930,000	7,484,000	5,446,000
Operating income/(loss)									48,100,000	45,086,000	77,205,000
Equity in earnings of affiliates, net of tax									0	(245,000)	755,000
Net income/(loss) from continuing operations									48,384,000	44,310,000	81,310,000
Capital expenditures									4,025,000	4,062,000	2,658,000
Statement of Financial Position [Abstract]
Investment in affiliates, net	0				0				0	0
Long-lived assets	167,382,000				177,122,000				167,382,000	177,122,000
Total assets	211,515,000				226,034,000				211,515,000	226,034,000
Asset Management and Processing Solutions [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating revenue									335,224,000	329,273,000	368,536,000
Statement of Financial Position [Abstract]
Long-lived assets	167,382,000				177,122,000				167,382,000	177,122,000
Asset Management and Processing Solutions [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating revenue									0	0	0
Statement of Financial Position [Abstract]
Long-lived assets	0				0				0	0
Corporate [Member]
Income Statement [Abstract]
Operating revenue									640,000	41,789,000	59,125,000
Depreciation and amortization									23,515,000	19,163,000	23,676,000
Operating income/(loss)									(106,493,000)	(104,521,000)	(135,364,000)
Equity in earnings of affiliates, net of tax									(21,785,000)	(18,670,000)	(28,308,000)
Net income/(loss) from continuing operations									(264,549,000)	(188,310,000)	(238,742,000)
Capital expenditures									10,871,000	12,128,000	32,249,000
Statement of Financial Position [Abstract]
Investment in affiliates, net	7,044,000				9,873,000				7,044,000	9,873,000
Long-lived assets	4,068,246,000				3,836,042,000				4,068,246,000	3,836,042,000
Total assets	4,344,263,000				4,218,145,000				4,344,263,000	4,218,145,000
Corporate [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating revenue									0	484,000	5,896,000
Statement of Financial Position [Abstract]
Long-lived assets	3,451,958,000				3,337,556,000				3,451,958,000	3,337,556,000
Corporate [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating revenue									640,000	41,305,000	53,229,000
Statement of Financial Position [Abstract]
Long-lived assets	616,288,000				498,486,000				616,288,000	498,486,000
Eliminations [Member]
Income Statement [Abstract]
Operating revenue									(19,956,000)	(62,737,000)	(77,015,000)
Depreciation and amortization									(135,000)	(841,000)	(807,000)
Operating income/(loss)									135,000	841,000	807,000
Equity in earnings of affiliates, net of tax									0	0	0
Net income/(loss) from continuing operations									135,000	841,000	807,000
Capital expenditures									0	0	0
Statement of Financial Position [Abstract]
Investment in affiliates, net	0				0				0	0
Long-lived assets	(3,902,463,000)				(3,668,241,000)				(3,902,463,000)	(3,668,241,000)
Total assets	(3,902,902,000)				(3,668,500,000)				(3,902,902,000)	(3,668,500,000)
Eliminations [Member] | Domestic Country [Member]
Income Statement [Abstract]
Operating revenue									(19,956,000)	(62,737,000)	(77,015,000)
Statement of Financial Position [Abstract]
Long-lived assets	(3,286,202,000)				(3,169,785,000)				(3,286,202,000)	(3,169,785,000)
Eliminations [Member] | Foreign Country [Member]
Income Statement [Abstract]
Operating revenue									0	0	0
Statement of Financial Position [Abstract]
Long-lived assets	$ (616,261,000)				$ (498,456,000)				$ (616,261,000)	$ (498,456,000)