Note 14 - Stock-Based Compensation (Details) - Options Outstanding (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number Outstanding (in Shares)	662,506
Number Exercisable (in Shares)	419,735
$7.72 to $8.93 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 7.72
Exercise Price Range, Upper Range	$ 8.93
Number Outstanding (in Shares)	58,510
Weighted Average Remaining Contractual Life	6 years 332 days
Weighted Average Exercise Price Options Outstanding	$ 8.12
Number Exercisable (in Shares)	22,520
Weighted Average Exercise Price Options Exercisable	$ 8.21
$9.00 to $11.64 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 9.00
Exercise Price Range, Upper Range	$ 11.64
Number Outstanding (in Shares)	212,004
Weighted Average Remaining Contractual Life	6 years 299 days
Weighted Average Exercise Price Options Outstanding	$ 9.21
Number Exercisable (in Shares)	101,355
Weighted Average Exercise Price Options Exercisable	$ 9.19
$13.25 to $16.85 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 13.25
Exercise Price Range, Upper Range	$ 16.85
Number Outstanding (in Shares)	243,567
Weighted Average Remaining Contractual Life	5 years 328 days
Weighted Average Exercise Price Options Outstanding	$ 15.85
Number Exercisable (in Shares)	149,435
Weighted Average Exercise Price Options Exercisable	$ 15.99
$17.00 to $18.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 17.00
Exercise Price Range, Upper Range	$ 18.60
Number Outstanding (in Shares)	51,840
Weighted Average Remaining Contractual Life	2 years 18 days
Weighted Average Exercise Price Options Outstanding	$ 18.05
Number Exercisable (in Shares)	49,840
Weighted Average Exercise Price Options Exercisable	$ 18.06
$18.67 to $20.90 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 18.67
Exercise Price Range, Upper Range	$ 20.90
Number Outstanding (in Shares)	67,885
Weighted Average Remaining Contractual Life	1 year 58 days
Weighted Average Exercise Price Options Outstanding	$ 19.48
Number Exercisable (in Shares)	67,885
Weighted Average Exercise Price Options Exercisable	$ 19.48
$21.00 to $22.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Lower Range	$ 21.00
Exercise Price Range, Upper Range	$ 22.00
Number Outstanding (in Shares)	28,700
Weighted Average Remaining Contractual Life	1 year 58 days
Weighted Average Exercise Price Options Outstanding	$ 21.28
Number Exercisable (in Shares)	28,700
Weighted Average Exercise Price Options Exercisable	$ 21.28