Note 1 - Summary of Significant Interim Accounting Policies (Details) - Significant Assumptions to Determine Fair Value of Share-Based Compensation Awards (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Stock Appreciation Rights (SARs) [Member]
Exercise price
Exercise Price (in Dollars per share)	$ 11.29		$ 13.15		$ 11.29		$ 13.15
Market price
Market Price (in Dollars per share)					$ 11.29		$ 13.15
Risk-free interest rate (1)
Risk-free interest rate		[1]		[1]	0.90%	[1]	0.80%	[1]
Expected award life (years)					5 years	[2]
Expected volatility (3)
Expected Volatility		[3]		[3]	46.00%	[3]	45.10%	[3]
Expected dividend yield (4)
Expected divided yield		[4]		[4]	4.80%	[4]	4.10%	[4]
Employee Stock Option [Member]
Exercise price
Exercise Price (in Dollars per share)	$ 11.70		$ 11.75		$ 11.70		$ 11.75
Market price
Market Price (in Dollars per share)	$ 11.70		$ 11.75
Risk-free interest rate (1)
Risk-free interest rate	1.70%	[1]	1.90%	[1]		[1]		[1]
Expected award life (years)	10 years	[2]
Expected volatility (3)
Expected Volatility	36.70%	[3]	36.40%	[3]		[3]		[3]
Expected dividend yield (4)
Expected divided yield	4.60%	[4]	4.60%	[4]		[4]		[4]
Employee Stock Option [Member] | Minimum [Member]
Exercise price
Exercise Price (in Dollars per share)	$ 11.29		$ 11.75		$ 11.29		$ 11.75
Market price
Market Price (in Dollars per share)					$ 11.29		$ 11.75
Risk-free interest rate (1)
Risk-free interest rate					0.90%	[1]	0.80%	[1]
Expected award life (years)					5 years	[2]
Expected volatility (3)
Expected Volatility					36.70%	[3]	36.40%	[3]
Expected dividend yield (4)
Expected divided yield					4.60%	[4]	4.10%	[4]
Employee Stock Option [Member] | Maximum [Member]
Exercise price
Exercise Price (in Dollars per share)	$ 11.70		$ 13.15		$ 11.70		$ 13.15
Market price
Market Price (in Dollars per share)					$ 11.70		$ 13.15
Risk-free interest rate (1)
Risk-free interest rate					1.70%	[1]	1.90%	[1]
Expected award life (years)					10 years	[2]
Expected volatility (3)
Expected Volatility					46.00%	[3]	45.10%	[3]
Expected dividend yield (4)
Expected divided yield					4.80%	[4]	4.60%	[4]

[1] The risk-free interest rate is based on the yield of a U.S. treasury bond with a similar maturity as the expected life of the awards.

[2] The expected life in years for awards granted was based on the historical exercise patterns experienced by the Company when the award is made.

[3] The determination of expected stock price volatility for awards granted in each of the three and six-month periods ending June 30, was based on historical prices of the Company's common stock over a period commensurate with the expected life.

[4] The dividend yield assumption is based on the history and expectation of the Company's dividend payouts.