Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net income	$ 10,029,000	$ 7,167,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization of leasehold improvement	1,193,000	1,097,000
Change in fair value of mortgage servicing rights	562,000	1,774,000
Loan loss reserve release	750,000
Provision for deferred tax expense	4,052,000	3,717,000
Originations of loans held-for-sale	(75,079,000)	(83,698,000)
Proceeds from sales of loans held-for-sale	76,649,000	83,324,000
Net gain on sales of mortgage loans	(2,620,000)	(2,854,000)
Net discount accretion of purchase accounting adjustment on loans	(850,000)
Change in current income taxes receivable (payable)	(66,000)	259,000
Increase in cash surrender value of bank-owned life insurance	(709,000)	(604,000)
Change in accrued interest receivable and other assets	1,665,000	(3,152,000)
Change in accrued interest payable and other liabilities	16,895,000	(185,000)
Net discount (accretion)/premium amortization on securities	293,000	(385,000)
Securities losses, net	267,000	61,000
Amortization of core deposit	50,000
Amortization of junior subordinated debentures issuance costs	24,000	24,000
Amortization of senior notes issuance costs	52,000
Stock based compensation	625,000	325,000
Net gain on sale of other real estate owned	(178,000)	(67,000)
Provision for other real estate owned losses	710,000	940,000
Net loss on disposal of fixed assets	(11,000)	1,000
Loss on transfer of premises to other real estate owned	1,000
Net cash provided by (used in) operating activities	34,304,000	7,744,000
Cash flows from investing activities
Proceeds from maturities and calls including pay down of securities available-for-sale	78,564,000	25,687,000
Proceeds from sales of securities available-for-sale	100,856,000	44,993,000
Purchases of securities available-for-sale	(205,755,000)	(122,700,000)
Proceeds from maturities and calls including pay down of securities held-to-maturity		3,372,000
Proceeds from sales of Federal Home Loan Bank stock	(675,000)	600,000
Net change in loans	(64,585,000)	(28,805,000)
Improvements in other real estate owned		(12,000)
Proceeds from sales of other real estate owned	3,280,000	2,996,000
Proceeds from disposition of premises and equipment	13,000
Net purchases of premises and equipment	(375,000)	(439,000)
Net cash (used in) provided by investing activities	(88,677,000)	(74,308,000)
Cash flows from financing activities
Net change in deposits	43,360,000	23,039,000
Net change in securities sold under repurchase agreements	10,646,000	9,068,000
Net change in other short-term borrowings	5,000,000	35,000,000
Payment of senior note issuance costs	(42,000)
Dividends paid common stock	(592,000)	(296,000)
Purchase of treasury stock	(236,000)	(254,000)
Net cash (used in) provided by financing activities	58,136,000	66,557,000
Net change in cash and cash equivalents	3,763,000	(7,000)
Cash and cash equivalents at beginning of period	47,334,000	40,338,000
Cash and cash equivalents at end of period	51,097,000	40,331,000
Supplemental cash flow information
Income taxes paid	230,000	100,000
Interest paid for deposits	2,448,000	2,053,000
Interest paid for borrowings	3,787,000	2,665,000
Non-cash transfer of loans to other real estate owned	3,525,000	968,000
Non-cash transfer of premises to other real estate owned	$ 95,000
Non-cash transfer of securities held-to-maturity to securities available-for-sale		$ 244,823,000