ACQUISITIONS, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	9 Months Ended			12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Purchase Price
Cash paid, net of cash acquired	$ (1,220)		$ 10,573	$ (1,192)	$ 10,573
Common stock issued	0		$ 18,149	0	$ 18,149
Allocation
Goodwill	14,698			14,698		$ 15,387
Total intangible assets, net	11,688			11,688		$ 14,656
Cirrus Technologies, SpeedRoute, And Pro Securities [Member]
Purchase Price
Cash paid, net of cash acquired		$ 9,353
Common stock issued		18,149
Purchase Price		27,502
Allocation
Goodwill		11,914
Intangibles		16,000
Accounts receivable and other assets		2,565
Other liabilities assumed		(2,977)
Assets acquired and liabilities assumed, net		27,502
Less: accumulated amortization of acquired intangible assets		(4,599)
Total intangible assets, net		11,401
Cirrus Technologies, SpeedRoute, And Pro Securities [Member] | Other
Allocation
Indefinite-lived intangible assets acquired		200
Cirrus Technologies, SpeedRoute, And Pro Securities [Member] | Technology and developed software
Allocation
Finite-lived intangible assets acquired		$ 13,600
Useful Life		8 years 2 months 16 days
Cirrus Technologies, SpeedRoute, And Pro Securities [Member] | Customer relationships
Allocation
Finite-lived intangible assets acquired		$ 1,900
Useful Life		4 years 9 months 29 days
Cirrus Technologies, SpeedRoute, And Pro Securities [Member] | Trade names
Allocation
Finite-lived intangible assets acquired		$ 300
Useful Life		1 month 13 days
SpeedRoute and Pro Securities [Member]
Allocation
Intangibles	$ 224			$ 224