PARENT COMPANY FINANCIALS ONLY (Details 1) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Derivative Asset		$ 22,331,000				$ 23,072,000				$ 22,331,000	$ 23,072,000
Income
Dividends received from subsidiaries(1)										(44,500,000)	(38,100,000)
Expenses
Interest expense		4,676,000	$ 4,640,000	$ 4,627,000	$ 4,850,000	4,985,000	$ 5,183,000	$ 5,269,000	$ 5,180,000	18,793,000	20,617,000	$ 20,417,000
Income tax benefit		7,698,000	9,793,000	9,508,000	8,428,000	8,268,000	7,867,000	7,213,000	3,869,000	35,427,000	27,218,000	23,899,000
Net Income		17,179,000	$ 20,484,000	$ 20,374,000	$ 18,611,000	$ 19,455,000	$ 18,594,000	$ 17,451,000	$ 9,460,000	76,648,000	64,960,000	59,845,000
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Derivative Asset		$ 1,364,000								1,364,000
Income
Dividends received from subsidiaries(1)	[1]									44,598,000	38,153,000	40,170,000
Interest income(2)	[2]									98,000	78,000	57,000
Total income										44,696,000	38,231,000	40,227,000
Expenses
Interest expense										5,901,000	5,769,000	4,225,000
Other expenses											29,000
Total expenses										5,901,000	5,798,000	4,225,000
Income before income taxes and equity in undistributed income of subsidiaries										38,795,000	32,433,000	36,002,000
Income tax benefit										(1,791,000)	(2,301,000)	(1,298,000)
Income of parent company										40,586,000	34,734,000	37,300,000
Equity in undistributed income of subsidiaries										36,062,000	30,226,000	22,545,000
Net Income										76,648,000	64,960,000	59,845,000
Consolidation, Eliminations [Member]
Income
Dividends received from subsidiaries(1)										$ (62,000)	$ (55,000)	$ (53,000)

[1] Income of $62,000, $55,000 and $53,000 was not eliminated in consolidation for the years ended December 31, 2016, 2015, and 2014, respectively.

[2] Entire balance eliminated in consolidation.