PARENT COMPANY FINANCIALS ONLY (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	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income
Dividends received from subsidiaries(1)										$ (38,100)	$ (40,100)
Expenses
Interest expense		$ 4,985	$ 5,183	$ 5,269	$ 5,180	$ 5,007	$ 4,805	$ 5,232	$ 5,374	20,617	20,417	$ 23,336
Income tax benefit		8,268	7,867	7,213	3,869	6,201	6,415	5,934	5,350	27,218	23,899	16,484
Net Income		$ 19,455	$ 18,594	$ 17,451	$ 9,460	$ 15,978	$ 15,738	$ 14,746	$ 13,383	64,960	59,845	50,254
Parent Company [Member]
Income
Dividends received from subsidiaries(1)	[1]									38,153	40,170	30,694
Interest income(2)	[2]									78	57	50
Total income										38,231	40,227	30,744
Expenses
Interest expense										5,769	4,225	4,122
Other expenses										29		15
Total expenses										5,798	4,225	4,137
Income before income taxes and equity in undistributed income of subsidiaries										32,433	36,002	26,607
Income tax benefit										(2,301)	(1,298)	(1,342)
Income of parent company										34,734	37,300	27,949
Equity in undistributed income of subsidiaries										30,226	22,545	22,305
Net Income										64,960	59,845	50,254
Consolidation, Eliminations [Member]
Income
Dividends received from subsidiaries(1)										$ 55	$ 53	$ 54

[1] Income of $55,000, $53,000 and $54,000 was not eliminated in consolidation for the years ended December 31, 2015, 2014, and 2013, respectively.

[2] Entire balance eliminated in consolidation.