PARENT COMPANY CONDENSED FINANCIAL STATEMENTS: (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash deposits in affiliated banks	$ 88,695	$ 78,102
Land and headquarters building, net	50,531	51,802
Other	44,573	48,857
TOTAL ASSETS	2,979,585	3,002,485
LIABILITIES AND SHAREHOLDERS' EQUITY
Other liabilities	80,392	90,173
TOTAL LIABILITIES	2,569,269	2,608,271
Shareholders' Equity	410,316	394,214	$ 386,195	$ 372,122
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	2,979,585	3,002,485
Parent
ASSETS
Cash deposits in affiliated banks	1,782	3,639
Investments in subsidiaries	413,117	396,486
Land and headquarters building, net	5,588	5,791
Other	12	103
TOTAL ASSETS	420,499	406,019
LIABILITIES AND SHAREHOLDERS' EQUITY
Dividends payable	6,243	6,341
Other liabilities	3,940	5,464
TOTAL LIABILITIES	10,183	11,805
Shareholders' Equity	410,316	394,214
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 420,499	$ 406,019