Operating Segments - Operating Profit (Loss) Per Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales to customers:
Net sales	$ 104,850	$ 95,031	$ 88,252	$ 87,956	$ 88,193	$ 86,333	$ 85,753	$ 87,169	$ 376,089	$ 347,448	$ 318,263
Gross profit:
Gross profit	25,608	19,599	19,441	18,951	19,525	18,625	18,825	19,041	83,599	76,016	65,283
Depreciation and amortization:
Depreciation and amortization									11,362	11,308	11,253
Income (loss) before income taxes:
Income (loss) before income taxes	$ 16,274	$ 11,681	$ 10,843	$ 10,182	$ 10,282	$ 21,628	$ 9,316	$ 11,532	48,980	52,758	44,717
Distillery products
Net sales to customers:
Net sales									314,055	291,008	265,243
Ingredient solutions
Net sales to customers:
Net sales									62,034	56,440	53,020
Operating Segments | Distillery products
Net sales to customers:
Net sales									314,055	291,008	265,243
Gross profit:
Gross profit									71,793	66,817	56,836
Depreciation and amortization:
Depreciation and amortization									8,739	8,490	8,371
Income (loss) before income taxes:
Income (loss) before income taxes									64,791	60,424	53,583
Operating Segments | Ingredient solutions
Net sales to customers:
Net sales									62,034	56,440	53,020
Gross profit:
Gross profit									11,806	9,199	8,447
Depreciation and amortization:
Depreciation and amortization									1,567	1,660	1,655
Income (loss) before income taxes:
Income (loss) before income taxes									9,336	6,613	5,836
Corporate
Depreciation and amortization:
Depreciation and amortization									1,056	1,158	1,227
Income (loss) before income taxes:
Income (loss) before income taxes									$ (25,147)	$ (14,279)	$ (14,702)