Note 7 - Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended September 30,
	2013			2012
Service cost	$	569		$	993
Interest cost		422			1,017
Expected return on plan assets		(375	)		(1,145	)
Amortization of prior service cost		(171	)		101
Amortization of net (gain) loss		660			706
Net periodic benefit cost	$	1,105		$	1,672

	Nine Months Ended September 30,
	2013			2012
Service cost	$	2,684		$	2,980
Interest cost		2,361			3,051
Expected return on plan assets		(2,784	)		(3,435	)
Amortization of prior service cost		24			301
Amortization of net (gain) loss		2,212			2,119
Net periodic benefit cost	$	4,497		$	5,016