PARENT COMPANY CONDENSED FINANCIAL STATEMENTS: (Details 1) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Income tax benefit									$ (12,127)	$ (11,145)	$ (20,622)
NET INCOME	$ 14,364	$ 12,257	$ 12,569	$ 9,682	$ 11,056	$ 11,313	$ 15,261	$ 8,953	48,872	46,583	29,131
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									64,825	40,199	28,591
Parent
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiaries									81,281	13,651	30,814
Other income									720	720	720
Other operating expenses									(4,327)	(2,814)	(2,647)
Income before income taxes and equity in undistributed earnings of subsidiaries									77,532	11,557	28,887
Income tax benefit									908	934	889
Income before equity in undistributed earnings of subsidiaries									78,440	12,491	29,776
Equity in undistributed earnings of subsidiaries									(29,568)	34,092	(645)
NET INCOME									$ 48,872	$ 46,583	$ 29,131