SECURITIES: (Details 3) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Less Than 12 Months
Fair Value	$ 464,602	$ 234,426
Unrealized Losses	(11,155)	(2,002)
More Than 12 Months
Fair Value	80,151	154,246
Unrealized Losses	(3,259)	(4,717)
Total
Fair Value	544,753	388,672
Unrealized Losses	(14,414)	(6,719)
U.S. Government entity mortgage-backed securities
Less Than 12 Months
Fair Value	12,224
Unrealized Losses	(377)
More Than 12 Months
Fair Value	0
Unrealized Losses	0
Total
Fair Value	12,224
Unrealized Losses	(377)
Mortgage-backed securities, residential
Less Than 12 Months
Fair Value	202,248	9,455
Unrealized Losses	(4,072)	(23)
More Than 12 Months
Fair Value	152	0
Unrealized Losses	(1)	0
Total
Fair Value	202,400	9,455
Unrealized Losses	(4,073)	(23)
Mortgage-backed securities, commercial
Less Than 12 Months
Fair Value		69,940
Unrealized Losses		(428)
More Than 12 Months
Fair Value		11,766
Unrealized Losses		(202)
Total
Fair Value		81,706
Unrealized Losses		(630)
Collateralized mortgage obligations
Less Than 12 Months
Fair Value	169,717	151,484
Unrealized Losses	(3,086)	(1,535)
More Than 12 Months
Fair Value	79,999	139,435
Unrealized Losses	(3,258)	(4,472)
Total
Fair Value	249,716	290,919
Unrealized Losses	(6,344)	(6,007)
State and municipal obligations
Less Than 12 Months
Fair Value	72,852	3,547
Unrealized Losses	(2,396)	(16)
More Than 12 Months
Fair Value	0	3,045
Unrealized Losses	0	(43)
Total
Fair Value	72,852	6,592
Unrealized Losses	(2,396)	$ (59)
Collateralized debt obligations
Less Than 12 Months
Fair Value	7,561
Unrealized Losses	(1,224)
More Than 12 Months
Fair Value	0
Unrealized Losses	0
Total
Fair Value	7,561
Unrealized Losses	$ (1,224)