CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and interest-bearing deposits in banks	$ 37,170	$ 45,142
Securities available-for-sale	318,159	276,984
Other assets	6,352	4,997
Total assets	1,927,733	1,936,740
Liabilities:
Junior subordinated debentures	22,167	22,167
Other	4,771	6,952
Total liabilities	1,714,596	1,727,728
Stockholders’ equity	213,137	209,012	$ 190,749	$ 189,241
Total liabilities and stockholders’ equity	1,927,733	1,936,740
Expenses:
Professional fees	1,560	1,802	1,709
Income before income taxes	15,600	26,468	20,327
Income tax benefit	(4,583)	(7,358)	(6,151)
Net earnings	11,017	19,110	14,176
Cash flows from operating activities:
Net earnings	11,017	19,110	14,176
Adjustments to reconcile net earnings to net cash provided by operating activities:
Net cash provided by operating activities	29,185	29,758	25,884
Cash flows from investing activities:
Purchases of securities available-for-sale	(156,449)	(1,250)	(68,043)
Proceeds from maturities and calls of securities available-for-sale	70,934	48,464	72,728
Proceeds from sale of securities available-for-sale	40,277	22,153	55,879
Net cash used in investing activities	(12,297)	(65,313)	(38,931)
Cash flows from financing activities:
Proceeds from exercise of stock options	99	643	69
Payment of dividends on preferred stock	(689)	(704)	(1,519)
Payment of dividends on common stock	(4,086)	(3,838)	(3,320)
Purchase of treasury stock	0	(9)	0
Repayments of notes payable	0	(1,000)	(1,000)
Net cash used in financing activities	(14,559)	62,696	(795)
Net increase (decrease) in cash and cash equivalents	2,329	27,141	(13,842)
Cash and cash equivalents, beginning of year	86,872	59,731	73,573
Cash and cash equivalents, end of year	89,201	86,872	59,731
Parent Company
Assets
Cash and interest-bearing deposits in banks	14,795	9,452
Securities available-for-sale	0	1,218
Other assets	2,117	4,486
Investment in and advances to subsidiaries	220,753	219,216
Total assets	237,665	234,372
Liabilities:
Dividends payable	1,195	1,208
Junior subordinated debentures	22,167	22,167
ESOP obligation	1,093	250
Other	73	1,735
Total liabilities	24,528	25,360
Stockholders’ equity	213,137	209,012
Total liabilities and stockholders’ equity	237,665	234,372
Revenue:
Dividends from Bank and nonbank subsidiaries	9,000	15,500	11,000
Gain on sale of securities	1,125	0	0
Rental and other income	57	87	125
Total revenue	10,182	15,587	11,125
Expenses:
Interest on short- and long-term debt	613	1,087	1,415
Professional fees	253	217	345
Other expenses	733	844	547
Total expenses	1,599	2,148	2,307
Income before income taxes	8,583	13,439	8,818
Equity in undistributed earnings of subsidiaries	2,317	4,955	4,600
Income tax benefit	117	716	758
Net earnings	11,017	19,110	14,176
Cash flows from operating activities:
Net earnings	11,017	19,110	14,176
Adjustments to reconcile net earnings to net cash provided by operating activities:
Undistributed earnings of subsidiaries	(2,317)	(4,955)	(4,600)
Gain on sale of securities available-for-sale	(1,125)	0	0
Other, net	528	(872)	(668)
Net cash provided by operating activities	8,103	13,283	8,908
Cash flows from investing activities:
Purchases of securities available-for-sale	0	0	(464)
Proceeds from maturities and calls of securities available-for-sale	0	198	0
Proceeds from sale of securities available-for-sale	1,392	0	0
Other, net	(83)	217	223
Net cash used in investing activities	1,309	415	(241)
Cash flows from financing activities:
Proceeds from exercise of stock options	99	643	69
Payment of dividends on preferred stock	(689)	(704)	(1,519)
Payment of dividends on common stock	(4,086)	(3,838)	(3,320)
Purchase of treasury stock	0	(9)	0
Repayments of notes payable	0	(8,217)	(1,000)
Other, net	607	0	0
Net cash used in financing activities	(4,069)	(12,125)	(5,770)
Net increase (decrease) in cash and cash equivalents	5,343	1,573	2,897
Cash and cash equivalents, beginning of year	9,452	7,879	4,982
Cash and cash equivalents, end of year	$ 14,795	$ 9,452	$ 7,879