Percentage of aggregate consideration for equity interest issued or issuable to acquire entity.

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The number of banking branches owned.

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Percentage of aggregate consideration for the cash outflow to acquire entity.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Number of shares of equity interests issued or issuable to acquire entity.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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- Definition

Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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Note 8 - Subsequent Event - Acquisition of Guaranty Bank and Trust Company (Details Textual) - USD ($)			3 Months Ended	9 Months Ended
	Oct. 02, 2017	Sep. 27, 2017	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2016	Sep. 29, 2017	Dec. 31, 2016
Share Price						$ 45.50
Repayments of Long-term Debt				$ 9,500,000
Assets				3,550,463,094	$ 3,280,986,109		$ 3,301,943,748
Loans and Leases Receivable, Net Amount				2,641,772,470			2,374,729,537
Deposits				$ 2,894,268,482			$ 2,669,261,273
Term Note [Member]
Debt Instrument, Face Amount		$ 7,000,000
Debt Instrument, Term		4 years
Debt Instrument, Interest Rate, Effective Percentage				4.34%
Term Note [Member] \| Scenario, Forecast [Member]
Repayments of Long-term Debt			$ 437,500
Term Note [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		3.00%
Subsequent Event [Member] \| Guaranty Bank and Trust Company [Member]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Business Acquisition, Equity Interest Issued or Issuable, Percentage of Aggregate Consideration	79.00%
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	678,670
Payments to Acquire Businesses, Gross, Percentage of Aggregate Consideration	21.00%
Payments to Acquire Businesses, Gross	$ 7,800,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	30,900,000
Business Combination, Consideration Transferred	38,700,000
Subsequent Event [Member] \| Guaranty Bank and Trust Company [Member] \| Minimum [Member] \| Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	2,500,000
Subsequent Event [Member] \| Guaranty Bank and Trust Company [Member] \| Maximum [Member] \| Core Deposits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 4,500,000
Guaranty Bank and Trust Company [Member] \| Subsequent Event [Member]
Number of Branches	5
Assets	$ 257,200,000
Loans and Leases Receivable, Net Amount	196,100,000
Deposits	$ 212,300,000