PARENT COMPANY FINANCIALS ONLY (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income
Dividends received from subsidiaries(1)									$ (40,100)		$ (30,600)
Expenses
Interest expense	5,007	4,805	5,232	5,374	5,666	5,831	5,880	5,958	20,417		23,336		23,393
Income tax benefit	6,201	6,415	5,934	5,350	2,786	5,299	4,285	4,114	23,899		16,484		14,673
Net Income	15,978	15,738	14,746	13,383	10,588	14,655	12,758	12,252	59,845		50,254		42,627
Parent Company [Member]
Income
Dividends received from subsidiaries(1)									40,170	[1]	30,694	[1]	28,709	[1]
Interest income(2)									57	[2]	50	[2]	83	[2]
Total income									40,227		30,744		28,792
Expenses
Interest expense									4,225		4,122		3,795
Other expenses											15		6
Total expenses									4,225		4,137		3,801
Income before income taxes and equity in undistributed income of subsidiaries									36,002		26,607		24,991
Income tax benefit									(1,298)		(1,342)		(1,636)
Income of parent company									37,300		27,949		26,627
Equity in undistributed income of subsidiaries									22,545		22,305		16,000
Net Income									59,845		50,254		42,627
Consolidation, Eliminations [Member]
Income
Dividends received from subsidiaries(1)									$ 53		$ 54		$ 45

[1] Income of $53,000, $54,000 and $45,000 was not eliminated in consolidation for the years ended December 31, 2014, 2013, and 2012, respectively.

[2] Entire balance eliminated in consolidation.