Note 17 - Stock-Based Compensation (Details) - Number of Shares to Be Issued Upon Exercise of Outstanding Stock-based Awards	Dec. 31, 2015 $ / shares shares
Equity compensation plans approved by security holders:
Number of shares to be issued upon exercise	206,000
Shares available for future issuance	364,280
Employee Stock Option [Member]
Equity compensation plans approved by security holders:
Number of shares to be issued upon exercise	97,000
Weighted average exercise price (in Dollars per share) | $ / shares	$ 26.62
Shares available for future issuance	364,000
Stock Appreciation Rights (SARs) [Member]
Equity compensation plans approved by security holders:
Number of shares to be issued upon exercise		[1]
Weighted average exercise price (in Dollars per share) | $ / shares		[1]
Shares available for future issuance		[2]
Restricted Stock [Member]
Equity compensation plans approved by security holders:
Number of shares to be issued upon exercise	104,000
Weighted average exercise price (in Dollars per share) | $ / shares
Shares available for future issuance		[2]
Performance Shares [Member]
Equity compensation plans approved by security holders:
Number of shares to be issued upon exercise		[3]
Weighted average exercise price (in Dollars per share) | $ / shares
Shares available for future issuance		[2]
Restricted Stock Units (RSUs) [Member]
Equity compensation plans approved by security holders:
Number of shares to be issued upon exercise	5,000
Weighted average exercise price (in Dollars per share) | $ / shares
Shares available for future issuance		[2]

[1] At December 31, 2015, approximately 517,000 SARs were outstanding at a weighted average grant price of $24.56. The number of shares to be issued upon exercise will be determined based on the difference between the grant price and the market price at the date of exercise.

[2] Under the 2015 Omnibus Equity Compensation Plan, shares of stock are authorized for issuance as incentive and nonqualified stock options, SARs, restricted stock, and restricted stock units

[3] The number of shares to be issued is dependent upon Bancorp achieving certain predefined performance targets and ranges from zero shares to approximately120,000 shares. As of December 31, 2015, the expected shares to be awarded are 89,915.