Note 11 - Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Text Block Supplement [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2013			2012			2011
Expected option life in years(1)		6.1			6.1			6.3
Expected stock price volatility percentage(2)		33	%		37	%		39	%
Risk-free interest rate percentage(3)		1.5	%		1.1	%		2.4	%
Expected dividend yield(4)		0.51	%		0.49	%		0.38	%
Fair value as of the date of grant	$	5.46		$	4.81		$	5.69

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

				Weighted
				Average
	Shares			Exercise Price
Outstanding at December 31, 2012		995,046		$	13.01
Granted		174,625			16.76
Exercised		(120,762	)		9.36
Forfeited		(33,150	)		13.83
Outstanding at December 31, 2013		1,015,759		$	14.07
Exercisable at December 31, 2013		684,309		$	13.48

Schedule of Nonvested Share Activity [Table Text Block]

						Weighted
						Average
				Weighted		Remaining
				Average		Contractual
				Grant Date		Life
	Shares			Fair Value		(in Years)
Service-based options:
Nonvested at December 31, 2012		297,330		$	5.21		5.2
Granted		174,625			5.46		7.0
Vested		(120,405	)		5.28		4.5
Forfeited		(20,100	)		5.46		4.0
Nonvested at December 31, 2013		331,450		$	5.30		5.5

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

				Weighted Average
				Grant Date
	Shares			Fair Value
Nonvested at December 31, 2012		114,819		$	13.49
Granted		62,550			14.29
Vested		(35,894	) (1)		13.67
Forfeited		(23,943	)		13.74
Nonvested at December 31, 2013		117,532		$	13.81