Note 6 - Defined Benefit Pension Plan (Tables)

9 Months Ended

Sep. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Costs of Retirement Plans [Table Text Block]

	Nine Months Ended						Three Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
	(in thousands)
Service cost including expected expenses and net of expected plan participant contributions	$	892		$	837		$	297		$	279
Interest cost		1,055			1,056			351			352
Expected return on plan assets		(2,314	)		(2,256	)		(770	)		(752	)
Amortization of prior service cost		-			11			-			4
Amortization of net actuarial loss		-			-			-			-
Net pension credit	$	(367	)	$	(352	)	$	(122	)	$	(117	)