Capitalized Data and Database Development Costs, Net (Table) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Capitalized Costs and Database Development [Line Items]
Capitalized Data And Development Costs Accumulated Amortization	$ (217,440)	$ (188,778)
Capitalized Data And Database Development Costs Gross	550,705	518,966
Capitalized data and database cost, net	333,265	330,188
Property Data [Member]
Capitalized Costs and Database Development [Line Items]
Capitalized Data And Database Development Costs Gross	477,221	446,991
Flood [Member]
Capitalized Costs and Database Development [Line Items]
Capitalized Data And Database Development Costs Gross	55,416	55,416
Eviction Data [Member]
Capitalized Costs and Database Development [Line Items]
Capitalized Data And Database Development Costs Gross	$ 18,068	$ 16,559