Condensed Consolidated Statements of Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Sales		$ 83,711	$ 83,880	$ 243,076	$ 260,815
Less: excise taxes		3,820	3,552	5,958	14,720
Net sales		79,891	80,328	237,118	246,095
Cost of sales	[1]	64,770	68,466	189,420	203,317
Gross profit		15,121	11,862	47,698	42,778
Selling, general and administrative expenses		6,981	5,497	19,706	20,002
Other operating income, net		(3,385)	0	(3,385)	0
Operating income		11,525	6,365	31,377	22,776
Equity method investment earnings		664	1,562	2,260	6,010
Interest expense, net		(341)	(114)	(980)	(374)
Income before income taxes		11,848	7,813	32,657	28,412
Income tax expense		2,316	1,042	9,758	8,700
Net income		9,532	6,771	22,899	19,712
Income attributable to participating securities		294	222	711	653
Net income attributable to common shareholders and used in EPS calculation (Note 3)		$ 9,238	$ 6,549	$ 22,188	$ 19,059
Share information:
Diluted weighted average common shares		16,653,717	17,155,072	16,626,024	17,316,649
Basic and diluted earnings per share (in usd per share)		$ 0.55	$ 0.38	$ 1.33	$ 1.10
Dividends and dividend equivalents per common share (in usd per share)		$ 0.02	$ 0	$ 0.10	$ 0.06

[1] Includes related party purchases of $6,700 and $11,372 for the quarters ended September 30, 2016 and 2015, respectively. Includes related party purchases of $19,639 and $33,503 for the year to date periods ended September 30, 2016 and 2015, respectively.