Acquisitions (Details) € in Thousands, $ in Thousands	Oct. 31, 2014 USD ($)	Oct. 31, 2014 EUR (€)	Sep. 03, 2014 USD ($)	Apr. 16, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Oct. 31, 2014 EUR (€)	Dec. 31, 2013 USD ($)
Business Acquisition [Line Items]
Goodwill					$ 833,512	$ 841,239		$ 784,561
Streetlinks LLC
Business Acquisition [Line Items]
Fair value of consideration transferred				$ 65,905
Intangible assets recorded in connection with acquisition				47,970
Goodwill				14,738
Cash paid for acquisition				60,905
Contingent consideration				$ 5,000
eMortgage Logic LLC
Business Acquisition [Line Items]
Fair value of consideration transferred			$ 28,263
Intangible assets recorded in connection with acquisition			11,270
Goodwill			14,058
Cash paid for acquisition			17,000
Contingent consideration			$ 10,231
CWI Group
Business Acquisition [Line Items]
Fair value of consideration transferred	$ 71,393	€ 56,937
Intangible assets recorded in connection with acquisition	33,399						€ 26,485
Goodwill	$ 47,123						€ 37,369
Minimum | Streetlinks LLC
Business Acquisition [Line Items]
Amortization period of acquired intangible assets				2 years
Minimum | eMortgage Logic LLC
Business Acquisition [Line Items]
Amortization period of acquired intangible assets			3 years
Minimum | CWI Group
Business Acquisition [Line Items]
Amortization period of acquired intangible assets	1 year	1 year
Maximum | Streetlinks LLC
Business Acquisition [Line Items]
Amortization period of acquired intangible assets				12 years
Maximum | eMortgage Logic LLC
Business Acquisition [Line Items]
Amortization period of acquired intangible assets			11 years
Maximum | CWI Group
Business Acquisition [Line Items]
Amortization period of acquired intangible assets	8 years	8 years