Segment Information (Tables) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net	$ 386,013,000	$ 365,970,000	$ 750,784,000	$ 692,074,000
Depreciation and amortization	37,272,000	35,366,000	73,192,000	64,872,000
Operating Income (Loss)	60,707,000	41,020,000	109,972,000	55,844,000
Income (Loss) from Equity Method Investments	4,667,000	3,874,000	8,434,000	6,257,000
Net income from continuing operations	33,264,000	26,969,000	62,762,000	24,056,000
Expenditures for Additions to Long-lived Assets	17,562,000	22,217,000	40,203,000	42,829,000
Segment Reporting Information, Assets (Excluding Discontinued Operations Assets)	3,520,349,000		3,520,349,000		$ 3,512,095,000
Data and Analytics [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net	174,584,000	170,770,000	340,135,000	309,628,000
Depreciation and amortization	25,823,000	25,812,000	51,426,000	45,904,000
Operating Income (Loss)	24,878,000	28,141,000	51,283,000	43,957,000
Income (Loss) from Equity Method Investments	(383,000)	(202,000)	(905,000)	(215,000)
Net income from continuing operations	24,401,000	27,960,000	50,244,000	43,741,000
Expenditures for Additions to Long-lived Assets	12,437,000	15,397,000	29,371,000	27,647,000
Segment Reporting Information, Assets (Excluding Discontinued Operations Assets)	1,848,693,000		1,848,693,000		1,886,478,000
Technology and Processing Solutions [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net	213,992,000	198,066,000	415,612,000	387,564,000
Depreciation and amortization	6,545,000	6,615,000	13,317,000	13,094,000
Operating Income (Loss)	57,114,000	32,705,000	101,287,000	57,906,000
Income (Loss) from Equity Method Investments	8,068,000	6,409,000	14,731,000	10,387,000
Net income from continuing operations	65,099,000	45,053,000	115,860,000	74,098,000
Expenditures for Additions to Long-lived Assets	1,262,000	1,971,000	2,699,000	4,832,000
Segment Reporting Information, Assets (Excluding Discontinued Operations Assets)	1,336,500,000		1,336,500,000		1,297,903,000
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net	9,000	(97,000)	32,000	0
Depreciation and amortization	4,904,000	2,939,000	8,449,000	5,874,000
Operating Income (Loss)	(21,285,000)	(19,826,000)	(42,598,000)	(46,019,000)
Income (Loss) from Equity Method Investments	(3,018,000)	(2,333,000)	(5,392,000)	(3,915,000)
Net income from continuing operations	(56,236,000)	(46,044,000)	(103,342,000)	(93,783,000)
Expenditures for Additions to Long-lived Assets	3,863,000	4,849,000	8,133,000	10,350,000
Segment Reporting Information, Assets (Excluding Discontinued Operations Assets)	5,103,449,000		5,103,449,000		5,102,328,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Services, Net	(2,572,000)	(2,769,000)	(4,995,000)	(5,118,000)
Depreciation and amortization	0	0	0	0
Operating Income (Loss)	0	0	0	0
Income (Loss) from Equity Method Investments	0	0	0	0
Net income from continuing operations	0	0	0	0
Expenditures for Additions to Long-lived Assets	0	$ 0	0	$ 0
Segment Reporting Information, Assets (Excluding Discontinued Operations Assets)	$ (4,768,293,000)		$ (4,768,293,000)		$ (4,774,614,000)