OTHER NONINTEREST REVENUE AND EXPENSE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other noninterest revenue [Abstract]
Bank-owned life insurance	$ 7,457	$ 8,848	$ 8,314
Other miscellaneous income	12,143	12,883	14,543
Total other noninterest income	19,600	21,731	22,857
Other noninterest income [Abstract]
Advertising	4,288	4,388	4,558
Foreclosed property expense	7,418	17,071	11,728
Telecommunications	7,451	8,720	8,481
Public relations	2,178	3,399	4,258
Data processing	21,923	20,736	21,586
Computer software	10,500	10,525	8,496
Amortization of intangibles	3,963	4,443	2,979
Legal expenses	30,346	9,822	20,426
Merger expense	25	1,761
Postage and shipping	4,535	4,745	4,369
Other miscellaneous expense	58,083	58,516	56,177
Total other noninterest expense	$ 150,710	$ 144,126	$ 143,058