Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities
Net income	$ 53,117	$ 33,117	$ 23,912
Items not requiring (providing) cash
Provision for loan losses	2,906	2,470	1,842
Depreciation and amortization	6,813	5,936	5,275
Share based compensation	251	325	324
Mortgage servicing rights, net impairment	(60)	80	110
Premium amortization on securities, net	5,798	6,024	6,162
Loss (gain) on sale of investment securities	443	(38)	(1,836)
Gain on sale of mortgage loans	(6,613)	(7,906)	(11,675)
Proceeds from sales of loans	197,492	231,410	328,377
Loans originated for sale	(188,823)	(218,511)	(316,875)
Change in cash value life insurance	(1,912)	(1,797)	(1,618)
Death benefit on bank owned life insurance	154
Loss (gain) on sale of other real estate owned	(209)	(4)	261
Net change in:
Interest receivable	(1,180)	(2,591)	(544)
Interest payable	1,145	152	(275)
Other assets	2,460	6,173	489
Other liabilities	658	(5,776)	(8,381)
Net cash provided by operating activities	72,440	49,064	25,548
Transfer of loans to other real estate
Purchases of securities available for sale	(214,706)	(149,376)	(225,555)
Proceeds from sales, maturities, calls and principal repayments of securities available for sale	123,377	85,587	269,587
Purchases of securities held to maturity	(28,374)	(31,794)	(45,832)
Proceeds from maturities of securities held to maturity	8,301	13,376	30,843
Net change in interest-earning time deposits	717	950	(4,083)
Change in Federal Reserve and FHLB stock	32	8,987	(5,448)
Net change in loans	(182,637)	(251,821)	32,099
Proceeds on the sale of OREO and repossessed assets	3,258	4,238	2,572
Change in premises and equipment, net	(3,434)	(2,689)	(1,383)
Purchases of bank owned life insurance	(10,450)
Net cash provided by (used in) investing activities	(303,916)	(278,924)	222,307
Net change in:
Deposits	258,373	(13,360)	46,590
Borrowings	(13,589)	259,895	(255,994)
Redemption of preferred stock			(12,500)
Proceeds from issuance of stock	622	1,604	572
Dividends paid on common stock	(15,418)	(11,720)	(8,382)
Dividends paid on preferred stock			(42)
Net cash provided by (used in) financing activities	229,988	236,419	(229,756)
Net Change in Cash and Cash Equivalents	(1,488)	6,559	18,099
Cash and Cash Equivalents at Beginning of Year	59,980	53,421	35,322
Cash and Cash Equivalents at End of Year	58,492	59,980	53,421
Additional Supplemental Information
Interest paid	30,454	15,969	20,572
Income taxes paid	6,819	10,350	6,916
Transfer of loans to other real estate	$ 3,005	2,411	3,679
Kosciusko Financial Inc [Member]
Transfer of loans to other real estate
Net cash received in acquisition			30,437
LaPorte Bancorp Inc [Member]
Transfer of loans to other real estate
Net cash received in acquisition			116,521
Central National Bank & Trust [Member]
Transfer of loans to other real estate
Net cash received in acquisition			$ 22,549
Single Branch of First Farmers Bank & Trust Co [Member]
Transfer of loans to other real estate
Net cash received in acquisition		11,000
Lafayette Community Bancorp [Member]
Transfer of loans to other real estate
Net cash received in acquisition		20,425
Gain on remeasurement of equity interest in Lafayette		(530)
Wolverine Bancorp Inc [Member]
Transfer of loans to other real estate
Net cash received in acquisition		$ 12,723

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Payments for proceeds from federal reserve and federal home loan bank stock.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The increase (decrease) during the reporting period in interest payable, which represents the amount owed to note holders, bond holders, and other parties for interest earned on loans or credit extended to the reporting entity.

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The adjustment to the carrying value of the rights retained or purchased to service mortgages. These adjustments are made when the estimate of the fair value is changed. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The amount of cash paid for the origination of mortgages that are held for sale.

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The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.

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