Intangible and Other Non-Current Assets (Summary Of Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 23,050		$ 23,050
Accumulated amortization	14,374		14,053
Net book value	8,676		8,997
Other non-current assets	236		241
Total intangible and other non-current assets, net	8,912		9,238
Total amortization expense	321	$ 321
Brand
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	18,000		18,000
Accumulated amortization	10,295		10,030
Net book value	$ 7,705		7,970
Brand | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives (in years)	15 years
Brand | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives (in years)	17 years
Distributor relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,700		2,700
Accumulated amortization	1,878		1,829
Net book value	$ 822		871
Distributor relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives (in years)	10 years
Distributor relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives (in years)	14 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable lives (in years)	7 years
Gross carrying amount	$ 1,900		1,900
Accumulated amortization	1,900		1,900
Net book value	$ 0		0
Legacy permits
Finite-Lived Intangible Assets [Line Items]
Amortizable lives (in years)	14 years
Gross carrying amount	$ 250		250
Accumulated amortization	175		171
Net book value	$ 75		79
Trademark
Finite-Lived Intangible Assets [Line Items]
Amortizable lives (in years)	20 years
Gross carrying amount	$ 200		200
Accumulated amortization	126		123
Net book value	$ 74		$ 77