Note 12 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

	Stock Options Outstanding					Non-Vested Stock Awards Outstanding
	Number of Shares (000)			Weighted Average Exercise Price		Number of Shares (000)			Weighted Average Grant-Date Fair-Value
Balance, December 31, 2011		228		$	26.76		127		$	26.49
Granted		-			-		51			26.29
Stock Options Exercised		-			-		-			-
Stock Awards Vested		-			-		(44	)		28.29
Forfeited/Expired		(10	)		26.54		-			-
Balance, December 31, 2012		218			26.77		134			25.89
Granted		-			-		75			26.89
Stock Options Exercised		(24	)		24.88		-			-
Stock Awards Vested		-			-		(63	)		26.82
Forfeited/Expired		(9	)		26.16		(1	)		26.54
Balance, December 31, 2013		185			27.04		145			26.00
Granted		-			-		134			37.51
Stock Options Exercised		(65	)		25.86		-			-
Stock Awards Vested		-			-		(51	)		30.62
Forfeited/Expired		-			-		(1	)		26.54
Balance, December 31, 2014		120		$	27.72		227		$	31.88
Exercisable, December 31, 2014		120		$	27.72

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

					Options Outstanding						Options Exercisable
Range of Exercise Prices					Number of Shares (000)		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number of Shares (000)		Weighted Average Exercise Price
$	24.50	-	$	24.50		20		0.39		24.50		20		24.50
	26.19	-		27.67		32		1.37		26.21		32		26.21
	28.42	-		28.42		34		2.41		28.42		34		28.42
	30.31	-		30.31		34		3.41		30.31		34		30.31