BUSINESS ACQUISITIONS (Details - Pro Forma Information) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma revenue	$ 917,393	$ 729,370	$ 461,969
Pro forma net income from continuing operations	111,376	(2,998)	31,139
Contingent consideration arrangements, after tax contingent consideration expense	7,700	14,400
Acquisition-related costs		6,900	$ 1,000
Revenue of acquirees since acquisition date	44,800
Earnings of acquiree since acquisition date	1,800
QuoteWizard [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma revenue	900,978	701,184
Pro forma net income from continuing operations	110,015	1,164
Contingent consideration arrangements, after tax contingent consideration expense	4,900
Acquisition-related costs	4,800	$ 5,900
Revenue of acquirees since acquisition date	31,300
Earnings of acquiree since acquisition date	$ 2,200