Note 7 - Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31,
	2014			2013
Service cost	$	1,020		$	1,057
Interest cost		1,186			970
Expected return on plan assets		(1,249	)		(1,204	)
Amortization of prior service cost (benefit)		(84	)		97
Amortization of net loss		756			776
Net periodic benefit cost	$	1,629		$	1,696