Note 7 - Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended September 30,
	2014			2013
Service cost	$	1,020		$	569
Interest cost		1,186			422
Expected return on plan assets		(1,249	)		(375	)
Amortization of prior service cost		(84	)		(171	)
Amortization of net (gain) loss		756			660
Net periodic pension cost	$	1,629		$	1,105

	Nine Months Ended September 30,
	2014			2013
Service cost	$	3,060		$	2,684
Interest cost		3,558			2,361
Expected return on plan assets		(3,747	)		(2,784	)
Amortization of prior service cost		(252	)		24
Amortization of net (gain) loss		2,268			2,212
Net periodic pension cost	$	4,887		$	4,497