ACQUISITIONS - RentRange, Investability and Onit Solutions (Details) - USD ($) shares in Thousands, $ in Thousands		9 Months Ended
	Oct. 09, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Acquisitions
Acquisition of businesses with restricted shares		$ 0	$ 14,427
Goodwill		89,905		$ 82,801
RentRange, Investability and Onit Solutions
Acquisitions
Business combination, consideration transferred	$ 24,800
Cash payment to acquire business	$ 17,500
Number of shares exchanged for acquisition (in thousands)	247
Acquisition of businesses with restricted shares	$ 7,300
Contingent consideration arrangements, payment period	4 years
Cash		3
Accounts receivable, net		169
Premises and equipment, net		1,404
Other assets		3
Trademarks and trade names		1,205
Databases/other		1,945
Non-compete agreements		330
Customer relationships		255
Goodwill		19,615
Total assets		24,929
Accounts payable and accrued expenses		(345)
Purchase price		24,584
Initial purchase price allocation | RentRange, Investability and Onit Solutions
Acquisitions
Cash	$ 3
Accounts receivable, net	245
Premises and equipment, net	2,471
Other assets	199
Trademarks and trade names	1,205
Databases/other	910
Non-compete agreements	330
Customer relationships	255
Goodwill	19,565
Total assets	25,183
Accounts payable and accrued expenses	(391)
Purchase price	$ 24,792
Adjustments | RentRange, Investability and Onit Solutions
Acquisitions
Cash		0
Accounts receivable, net		(76)
Premises and equipment, net		(1,067)
Other assets		(196)
Trademarks and trade names		0
Databases/other		1,035
Non-compete agreements		0
Customer relationships		0
Goodwill		50
Total assets		(254)
Accounts payable and accrued expenses		46
Purchase price		$ (208)