Comprehensive income (loss) (Tables)

12 Months Ended

Dec. 31, 2013

Stockholders' Equity Note [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The components of accumulated other comprehensive income (loss) as of December 31, 2013 and 2012, and reclassifications out of other comprehensive income (loss) for the years then ended, are presented below (in thousands):

					Accumulated Other
	Pension Liability		Fair Value of		Comprehensive
	Adjustment		Derivatives		Income (Loss)
Balance at January 1, 2013	$	(43)	$	80	$	37
Other comprehensive income (loss):
Net change from periodic revaluations, net of taxes		(185)		789		604
Total other comprehensive income (loss) before reclassifications, net of taxes		(228)		869		641
Net amount reclassified to earnings		112		(1,445)		(1,333)
Balance at December 31, 2013	$	(116)	$	(576)	$	(692)

					Accumulated Other
	Pension Liability		Fair Value of		Comprehensive
	Adjustment		Derivatives		Income (Loss)
Balance at January 1, 2012	$	95	$	(1,122)	$	(1,027)
Other comprehensive income (loss):
Net change from periodic revaluations, net of taxes		(228)		2,143		1,915
Total other comprehensive income (loss) before reclassifications, net of taxes		(133)		1,021		888
Net amount reclassified to earnings		90		(941)		(851)
Balance at December 31, 2012	$	(43)	$	80	$	37