Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 34,519	$ 42,610
Federal funds sold and interest bearing due from banks	36,251	25,093
Mortgage loans held for sale	1,757	14,047
Securities available for sale (amortized cost of $493,066 in 2013 and $377,383 in 2012)	490,031	386,440
Federal Home Loan Bank stock	6,334	5,180
Other securities	1,013	1,000
Loans	1,721,350	1,584,594
Less allowance for loan losses	28,522	31,881
Net loans	1,692,828	1,552,713
Premises and equipment, net	39,813	36,532
Bank owned life insurance	29,180	28,149
Accrued interest receivable	5,712	5,091
Other assets	51,824	51,407
Total assets	2,389,262	2,148,262
Deposits
Non-interest bearing	423,350	396,159
Interest bearing	1,557,587	1,385,534
Total deposits	1,980,937	1,781,693
Securities sold under agreements to repurchase	62,615	59,045
Federal funds purchased	55,295	16,552
Accrued interest payable	128	166
Other liabilities	26,514	22,949
Federal Home Loan Bank advances	34,329	31,882
Subordinated debentures		30,900
Total liabilities	2,159,818	1,943,187
Stockholders' equity
Preferred stock, no par value; 1,000,000 shares authorized; no shares issued or outstanding
Common stock, no par value; 20,000,000 shares authorized; issued and outstanding 14,608,556 shares in 2013 and 13,915,265 shares in 2012	9,581	7,273
Additional paid-in capital	33,255	17,731
Retained earnings	188,825	174,650
Accumulated other comprehensive (loss) income	(2,217)	5,421
Total stockholders' equity	229,444	205,075
Total liabilities and stockholders' equity	$ 2,389,262	$ 2,148,262