Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding shares in Thousands	Dec. 31, 2015 $ / shares shares
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	614
Options and SARs exercisable	437
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 24.88
Stock Options and Stock Appreciation Rights SARs Expiring in 2016 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	6
Options and SARs exercisable	6
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 24.07
Stock Options and Stock Appreciation Rights SARs Expiring in 2017 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	91
Options and SARs exercisable	91
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 26.80
Stock Options and Stock Appreciation Rights SARs Expiring in 2018 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	64
Options and SARs exercisable	64
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 23.37
Stock Options and Stock Appreciation Rights SARs Expiriing in 2019 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	65
Options and SARs exercisable	65
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 22.14
Stock Options and Stock Appreciation Rights SARs Expiring in 2020 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	74
Options and SARs exercisable	74
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 21.03
Stock Options and Stock Appreciation Rights SARs Expiring in 2021 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	57
Options and SARs exercisable	46
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 23.78
Stock Options and Stock Appreciation Rights SARs Expiring in 2022 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	90
Options and SARs exercisable	54
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 22.87
Stock Options and Stock Appreciation Rights SARs Expiring in 2023 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	54
Options and SARs exercisable	25
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 22.89
Stock Options and Stock Appreciation Rights SARs Expiring in 2024 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	62
Options and SARs exercisable	12
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 29.05
Stock Options and Stock Appreciation Rights SARs Expiring in 2025 [Member]
Note 17 - Stock-Based Compensation (Details) - Options and SARS Outstanding [Line Items]
Number of options and SARs outstanding	51
Weighted average exercise price of options and SARs outstanding (in Dollars per share) | $ / shares	$ 34.48