Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income (loss)	$ 4,086,000	$ (2,272,000)	$ 7,542,000	$ 5,689,000
Post retirement benefit plan adjustments:
Amortization of net actuarial loss	44,000	45,000	87,000	90,000
Amortization of prior service credits	(124,000)	(124,000)	(248,000)	(248,000)
Income tax benefit	16,000	16,000	33,000	33,000
Comprehensive income (loss)	4,022,000	(1,659,000)	7,414,000	4,321,000
Foreign currency hedging derivatives:
Foreign currency hedging derivatives:
Unrealized hedge gain (loss)	0	803,000	0	(871,000)
Income tax benefit (expense)	0	(174,000)	0	186,000
Interest rate swaps:
Foreign currency hedging derivatives:
Unrealized hedge gain (loss)	0	61,000	0	(722,000)
Income tax benefit (expense)	$ 0	$ (14,000)	$ 0	$ 164,000