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FAIR VALUES OF FINANCIAL INSTRUMENTS: (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Total realized/unrealized gains or losses
Beginning balance, January 1	$ 18,285	$ 16,578
Included in earnings	0	0
Included in other comprehensive income	(2,840)	2,773
Purchases	0	0
Settlements	(9,052)	(1,066)
Ending balance, December 31	6,393	18,285
State and municipal obligations
Total realized/unrealized gains or losses
Beginning balance, January 1	3,680	4,210
Included in earnings	0	0
Included in other comprehensive income	0
Purchases	0	0
Settlements	(545)	(530)
Ending balance, December 31	3,135	3,680
Collateralized debt obligations
Total realized/unrealized gains or losses
Beginning balance, January 1	14,605	12,368
Included in earnings	0	0
Included in other comprehensive income	(2,840)	2,773
Settlements	(8,507)	(536)
Ending balance, December 31	$ 3,258	$ 14,605

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Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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