Business Combinations - Narrative (Details) - USD ($) $ in Thousands				3 Months Ended		9 Months Ended		17 Months Ended
	Aug. 31, 2020	Jan. 02, 2020	May 01, 2019	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Aggregate cash consideration						$ 398,737	$ 1,319,929
Goodwill				$ 399,301		399,301		$ 399,301	$ 318,483
Nova Cold Logistics
Business Acquisition [Line Items]
Property, buildings and equipment				171,900		171,900		171,900
Deferred tax liability		$ 42,000		33,000	$ 34,500	33,000		33,000
Goodwill				64,600		64,600		64,600
Deferred tax liability, change				1,500	$ 7,500	9,000
Newport Cold
Business Acquisition [Line Items]
Aggregate cash consideration		56,700
Property, buildings and equipment		30,200
Goodwill		7,100
Cloverleaf
Business Acquisition [Line Items]
Deferred tax liability			$ 9,063	9,024		9,024		9,024	8,900
Goodwill			107,643	126,096		126,096		126,096
Deferred tax liability, change								(39)
Revenue since date of acquisition				53,900		93,400
Net income since date of acquisition				2,800		4,700
Deferred tax liability, intangible assets				1,900		1,900		1,900
Lanier Cold Storage
Business Acquisition [Line Items]
Aggregate cash consideration			81,900
Property, buildings and equipment			60,000
Deferred tax liability									$ 700
Goodwill			6,400
AM-C Warehouses
Business Acquisition [Line Items]
Aggregate cash consideration	$ 82,500
Property, buildings and equipment	53,700
Goodwill	9,500
Customer relationships | Nova Cold Logistics
Business Acquisition [Line Items]
Identifiable intangibles				53,900		$ 53,900		53,900
Weighted average remaining intangible amortization life (in months)						25 years
Customer relationships | Newport Cold
Business Acquisition [Line Items]
Identifiable intangibles		$ 18,700
Weighted average remaining intangible amortization life (in months)		25 years
Customer relationships | Cloverleaf
Business Acquisition [Line Items]
Identifiable intangibles			241,738	250,346		$ 250,346		250,346
Weighted average remaining intangible amortization life (in months)						25 years
Customer relationships | Lanier Cold Storage
Business Acquisition [Line Items]
Identifiable intangibles			$ 16,300
Weighted average remaining intangible amortization life (in months)			25 years
Customer relationships | AM-C Warehouses
Business Acquisition [Line Items]
Identifiable intangibles	$ 19,800
Weighted average remaining intangible amortization life (in months)	25 years
Trade names and trademarks | Cloverleaf
Business Acquisition [Line Items]
Identifiable intangibles			$ 1,623	$ 1,623		$ 1,623		$ 1,623
Weighted average remaining intangible amortization life (in months)						1 year 6 months