BUSINESS ACQUISITION BUSINESS ACQUISITION (Details - Changes in Contingent Consideration)			3 Months Ended					6 Months Ended
	Sep. 19, 2017 USD ($) payment	Jun. 14, 2017 USD ($) payment	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Business Acquisition [Line Items]
Contingent consideration payments								$ 3,000,000	$ 25,600,000
Current contingent consideration			$ 29,548,000		$ 11,080,000			29,548,000
Non-current contingent consideration			20,671,000		27,757,000			20,671,000
Change in fair value of contingent consideration			2,790,000			$ (167,000)		17,382,000	(908,000)
DepositAccounts
Business Acquisition [Line Items]
Initial cash consideration to acquire business		$ 24,000,000.0
Contingent consideration range, maximum		9,000,000.0
Contingent consideration			0					0
Contingent consideration payment							$ 1,000,000.0
Contingent consideration payments			2,000,000.0	$ 1,000,000.0	$ 1,000,000.0
Change in fair value of contingent consideration			(200,000)					(1,000,000.0)
Value of potential contingent consideration payments based on specified increases in federal funds interest rates		1,000,000.0
One-time contingent consideration performance payment		$ 2,000,000.0
Number Of Contingent Consideration Payments | payment		7
SnapCap
Business Acquisition [Line Items]
Initial cash consideration to acquire business	$ 11,900,000							0	$ 10,000
Number of payments | payment	3
Contingent consideration			5,200,000					5,200,000
Contingent consideration payments				$ 3,000,000.0
Current contingent consideration			2,900,000					2,900,000
Non-current contingent consideration			2,300,000					2,300,000
Change in fair value of contingent consideration			$ (100,000)					$ 1,500,000
Contingent earnout | SnapCap
Business Acquisition [Line Items]
Contingent consideration range, minimum	$ 0
Contingent consideration range, maximum	$ 3,000,000.0