BUSINESS ACQUISITION BUSINESS ACQUISITION (Details) - USD ($)					3 Months Ended		9 Months Ended
	Sep. 19, 2017	Jun. 20, 2017	Jun. 14, 2017	Nov. 17, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2017	Dec. 31, 2016	Nov. 16, 2016
Business Acquisition
Initial cash consideration to acquire business							$ 29,511,000	$ 0
Current contingent consideration					$ 24,014,000		24,014,000			$ 0
Non-current contingent consideration					30,544,000		30,544,000			23,600,000
Change in fair value of contingent consideration					2,501,000	$ 0	20,640,000	0
Goodwill					113,558,000		113,558,000			$ 56,457,000
Acquisition-related costs							1,000,000
Revenue					171,494,000	94,558,000	456,782,000	283,561,000
Operating Income (Loss)					17,455,000	14,150,000	33,308,000	38,710,000
Value of option to acquire a foreign affiliate		$ 500,000
Value of restricted stock unit awards		10,000,000
Pro forma revenue					172,400,000	118,219,000	465,624,000	347,442,000
Pro forma net income from continuing operations					10,043,000	$ 8,776,000	26,072,000	$ 23,556,000
After tax contingent consideration tax					1,500,000		12,400,000
MagnifyMoney
Business Acquisition
Initial cash consideration to acquire business		29,600,000					29,592,000
Working capital					921,000		921,000
Intangible assets		9,700,000			9,700,000		9,700,000
Goodwill		$ 23,800,000			23,784,000		23,784,000
Deferred tax liabilities					(4,176,000)		(4,176,000)
Noncontrolling interest					637,000		637,000
Acquisition-related costs							400,000
Weighted average useful life of intangible assets acquired		3 years 8 months 27 days
Revenue					1,200,000		1,300,000
Operating Income (Loss)					300,000		300,000
Granted (in shares)		38,468
Potential future issuance of restricted stock units		19,234
CompareCards
Business Acquisition
Initial cash consideration to acquire business				$ 80,700,000
Contingent consideration range, maximum											$ 45,000,000
Purchase price consideration on acquisition date				$ 103,800,000
Contingent consideration					43,100,000		43,100,000				23,100,000
Current contingent consideration					22,000,000		22,000,000
Non-current contingent consideration					21,100,000		21,100,000
Change in fair value of contingent consideration					1,900,000		20,000,000
Accounts receivable									$ 3,538,000
Intangible assets									55,400,000
Goodwill									52,450,000
Accounts payable and accrued liabilities									(7,638,000)
Total purchase price									$ (103,750,000)
Acquisition-related costs							100,000
DepositAccounts
Business Acquisition
Initial cash consideration to acquire business			$ 24,000,000
Contingent consideration range, maximum			9,000,000
Purchase price consideration on acquisition date			29,000,000				28,989,000
Contingent consideration			5,000,000		4,600,000		4,600,000
Current contingent consideration					1,500,000		1,500,000
Non-current contingent consideration					3,100,000		3,100,000
Intangible assets			9,600,000		9,600,000		9,600,000
Goodwill			19,400,000		19,389,000		19,389,000
Acquisition-related costs					100,000		300,000
Value of potential contingent consideration payments based on specified increases in federal funds interest rates			1,000,000
One-time contingent consideration performance payment			$ 2,000,000
Weighted average useful life of intangible assets acquired			5 years 1 month 25 days
Revenue					1,900,000		2,200,000
Operating Income (Loss)					400,000		600,000
Contingent consideration payment					1,000,000
Contingent earnout
Business Acquisition
Contingent consideration range, maximum	$ 3,000,000										22,500,000
SnapCap
Business Acquisition
Initial cash consideration to acquire business	11,900,000
Purchase price consideration on acquisition date	18,216,000
Contingent consideration	6,300,000
Working capital					42,000		42,000
Fixed assets					146,000		146,000
Intangible assets	4,100,000				4,100,000		4,100,000
Goodwill	$ 13,900,000				13,928,000		$ 13,928,000
Acquisition-related costs					200,000
Weighted average useful life of intangible assets acquired	8 years 7 months 3 days
Revenue					200,000
Operating Income (Loss)					$ 100,000
Technology | MagnifyMoney
Business Acquisition
Fair value of the intangible assets acquired with definite lives		$ 200,000
Weighted average useful life of intangible assets acquired		3 years
Technology | DepositAccounts
Business Acquisition
Fair value of the intangible assets acquired with definite lives			$ 8,600,000
Weighted average useful life of intangible assets acquired			5 years
Technology | SnapCap
Business Acquisition
Fair value of the intangible assets acquired with definite lives	$ 400,000
Weighted average useful life of intangible assets acquired	3 years
Customer lists | MagnifyMoney
Business Acquisition
Fair value of the intangible assets acquired with definite lives		$ 1,100,000
Weighted average useful life of intangible assets acquired		9 years
Customer lists | DepositAccounts
Business Acquisition
Fair value of the intangible assets acquired with definite lives			$ 600,000
Weighted average useful life of intangible assets acquired			8 years
Customer lists | SnapCap
Business Acquisition
Fair value of the intangible assets acquired with definite lives	$ 3,100,000
Weighted average useful life of intangible assets acquired	10 years
Trade name and trademarks | MagnifyMoney
Business Acquisition
Fair value of the intangible assets acquired with definite lives		$ 600,000
Weighted average useful life of intangible assets acquired		4 years
Trade name and trademarks | DepositAccounts
Business Acquisition
Fair value of the intangible assets acquired with definite lives			$ 400,000
Weighted average useful life of intangible assets acquired			4 years
Trade name and trademarks | SnapCap
Business Acquisition
Fair value of the intangible assets acquired with definite lives	$ 600,000
Weighted average useful life of intangible assets acquired	5 years
Website content | MagnifyMoney
Business Acquisition
Fair value of the intangible assets acquired with definite lives		$ 7,800,000
Weighted average useful life of intangible assets acquired		3 years
Contingent earnout | Iron Horse Holdings, LLC [Member]
Business Acquisition
Contingent consideration range, minimum											0
Contingent earnout | SnapCap
Business Acquisition
Contingent consideration range, minimum	$ 0
Minimum
Business Acquisition
Contingent consideration	0		$ 0								0
Maximum
Business Acquisition
Contingent consideration	$ 9,000,000		$ 9,000,000								$ 45,000,000