Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Unrealized gains on securities available for sale, tax (in Dollars)	$ 2,458,535	$ 5,230,784
Unrealized losses on interest rate caps derivatives, tax (in Dollars)	$ 237,670	$ 0
Series F Noncumulative Perpetual Preferred Stock [Member]
Redemption of shares of Non-cumulative Perpetual Preferred Stock		15,000
Common Stock [Member]
Proceeds from issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan	5,679	6,189
Proceeds from issuance of shares of common stock as a result of stock options exercised	9,688	9,814
Exchange of shares of common stock in connection with restricted stock vested	3,272	10,300

Number of shares of common stock exchanged in connection with restricted stock vested.

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- Definition

Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of share options (or share units) exercised during the current period.

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-Name Regulation S-X (SX)

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Number of stock bought back by the entity at the exercise price or redemption price.

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