PARENT COMPANY CONDENSED FINANCIAL STATEMENTS: (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Cash deposits in affiliated banks	$ 75,012	$ 88,695
Land and headquarters building, net	49,240	50,531
Other	37,789	44,573
TOTAL ASSETS	2,988,527	2,979,585
LIABILITIES AND SHAREHOLDERS' EQUITY
Other liabilities	64,485	80,392
TOTAL LIABILITIES	2,574,132	2,569,269
Shareholders' Equity	414,395	410,316	$ 394,214	$ 386,195
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	2,988,527	2,979,585
Parent
ASSETS
Cash deposits in affiliated banks	2,765	1,782
Investments in subsidiaries	416,024	413,117
Land and headquarters building, net	5,388	5,588
Other	0	12
TOTAL ASSETS	424,177	420,499
LIABILITIES AND SHAREHOLDERS' EQUITY
Dividends payable	6,104	6,243
Other liabilities	3,678	3,940
TOTAL LIABILITIES	9,782	10,183
Shareholders' Equity	414,395	410,316
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 424,177	$ 420,499