PARENT COMPANY CONDENSED FINANCIAL STATEMENTS: (Details 1) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Income tax benefit										$ (10,392)	$ (14,189)	$ (13,767)
NET INCOME	$ 7,114	$ 8,398	$ 6,923	$ 7,761	$ 9,181	$ 8,272	$ 8,488	$ 7,831		30,196	33,772	31,534
Comprehensive Income (Loss), Net of Tax, Attributable to Parent								$ 33,212	$ 25,037	35,324
Parent
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiaries										19,397	26,530	7,130
Other income										795	724	1,144
Other operating expenses										(2,314)	(2,747)	(3,113)
Income before income taxes and equity in undistributed earnings of subsidiaries										17,878	24,507	5,161
Income tax benefit										815	1,156	988
Income before equity in undistributed earnings of subsidiaries										18,693	25,663	6,149
Equity in undistributed earnings of subsidiaries										11,503	8,109	25,385
NET INCOME										$ 30,196	$ 33,772	$ 31,534