FAIR VALUES OF FINANCIAL INSTRUMENTS: (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Total realized/unrealized gains or losses
Beginning balance, January 1	$ 13,569	$ 16,033
Included in earnings	0	904
Included in other comprehensive income	7,100	3,155
Purchases	4,000	(1,186)
Settlements	(3,466)	(5,337)
Ending balance, December 31	21,203	13,569
State and municipal obligations
Total realized/unrealized gains or losses
Beginning balance, January 1	4,525	9,911
Included in earnings	0
Included in other comprehensive income	0
Purchases	4,000	(1,186)
Settlements	(2,625)	(4,200)
Ending balance, December 31	5,900	4,525
Collateralized debt obligations
Total realized/unrealized gains or losses
Beginning balance, January 1	9,044	6,122
Included in earnings	0	904
Included in other comprehensive income	7,100	3,155
Settlements	(841)	(1,137)
Ending balance, December 31	$ 15,303	$ 9,044

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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Amount of gain (loss) recognized in other comprehensive income (loss) 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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Amount of settlement of 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Fair value of 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 820

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