Related Party Transactions - Transactions with Anheuser-Busch, LLC (A-B), Ambev and Anheuser-Busch Worldwide Investments, LLC (ABWI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Percentage of stock owned by A-B	31.30%		31.30%		31.40%
Affiliated entity | Anheuser-Busch, LLC (A-B) and Ambev | Gross sales
Related Party Transaction [Line Items]
Sales revenue or fee earned from related party	$ 41,737	$ 46,147	$ 129,588	$ 127,932
Affiliated entity | Anheuser-Busch Worldwide Investments, LLC (ABWI) | International distribution fees
Related Party Transaction [Line Items]
Sales revenue or fee earned from related party	850	850	2,550	2,550
Affiliated entity | Anheuser-Busch Worldwide Investments, LLC (ABWI) | International distribution fees recorded in Deferred revenue
Related Party Transaction [Line Items]
International distribution fee, recorded as deferred revenue in Other accrued expenses	650	400	1,950	1,200
Affiliated entity | Anheuser-Busch Companies, LLC (ABC) | Contract Brewing fee earned
Related Party Transaction [Line Items]
Sales revenue or fee earned from related party	821	0	1,679	0
Affiliated entity | Anheuser-Busch, LLC (A-B) | Margin fee paid, classified as a reduction of Sales
Related Party Transaction [Line Items]
Fee paid to related party	601	649	1,806	1,806
Affiliated entity | Anheuser-Busch, LLC (A-B) | Inventory management and other fees paid, classified in Cost of sales
Related Party Transaction [Line Items]
Fee paid to related party	97	97	287	289
Affiliated entity | Anheuser-Busch, LLC (A-B) | Media and other reimbursement from A-B, classified as a reduction of Selling, general and administrative expenses
Related Party Transaction [Line Items]
Fee paid to related party	192	$ 221	192	$ 295
Affiliated entity | Anheuser-Busch, LLC (A-B) | Amounts due related to beer sales
Amounts due to or from Anheuser-Busch, LLC [Abstract]
Amount due from related parties	15,667		15,667		$ 15,663
Affiliated entity | Anheuser-Busch, LLC (A-B) | Refundable deposits
Amounts due to or from Anheuser-Busch, LLC [Abstract]
Amounts due to related party	(2,483)		(2,483)		(1,619)
Affiliated entity | Anheuser-Busch, LLC (A-B) | Services rendered
Amounts due to or from Anheuser-Busch, LLC [Abstract]
Amounts due to related party	(9,109)		(9,109)		(4,836)
Affiliated entity | Anheuser-Busch Worldwide Investments, LLC (ABWI) And Anheuser Busch, LLC (A-B) | International distribution fees
Amounts due to or from Anheuser-Busch, LLC [Abstract]
Amount due from related parties	4,500		4,500		5,000
Anheuser-Busch Worldwide Investments, LLC (ABWI) And Anheuser Busch, LLC (A-B) | Anheuser-Busch, LLC (A-B)
Amounts due to or from Anheuser-Busch, LLC [Abstract]
Net amount due from related party	$ 8,575		$ 8,575		$ 14,208