CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Cash and due from banks	$ 87,919	$ 85,523
Federal funds sold	10,215	26,398
Interest-bearing deposits at financial institutions	195,282	133,198
Securities held to maturity, at amortized cost	388,713	401,913
Securities available for sale, at fair value	255,090	261,056
Total securities	643,803	662,969
Loans receivable held for sale	4,180	1,295
Loans/leases receivable held for investment	3,906,339	3,731,459
Gross loans/leases receivable	3,910,519	3,732,754
Less allowance for estimated losses on loans/leases	(41,104)	(39,847)
Net loans/leases receivable	3,869,415	3,692,907
Bank-owned life insurance	68,735	67,783
Premises and equipment, net	78,887	75,582
Restricted investment securities	22,195	25,689
Other real estate owned, net	8,637	9,378
Goodwill	77,748	77,832
Intangibles	16,089	17,450
Other assets	115,927	75,001
Total assets	5,194,852	4,949,710
Liabilities and Stockholders' Equity
Noninterest-bearing	795,951	791,102
Interest-bearing	3,526,559	3,185,929
Total deposits	4,322,510	3,977,031
Short-term borrowings	19,191	28,774
Federal Home Loan Bank advances	105,733	266,492
Other borrowings		67,250
Subordinated notes	68,274	4,782
Junior subordinated debentures	37,755	37,670
Other liabilities	137,089	94,573
Total liabilities	4,690,552	4,476,572
Stockholders' Equity:
Preferred stock, $1 par value; shares authorized 250,000 June 2019 and December 2018- No shares issued or outstanding
Common stock, $1 par value; shares authorized 20,000,000 June 2019 - 15,772,939 shares issued and outstanding December 2018 - 15,718,208 shares issued and outstanding	15,773	15,718
Additional paid-in capital	272,744	270,761
Retained earnings	216,741	192,203
Accumulated other comprehensive income (loss):
Securities available for sale	2,412	(4,268)
Derivatives	(3,370)	(1,276)
Total stockholders' equity	504,300	473,138
Total liabilities and stockholders' equity	$ 5,194,852	$ 4,949,710