- Acquisition of Cloverleaf (Details) - USD ($) $ in Thousands	8 Months Ended
	Dec. 31, 2019	May 01, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Goodwill	$ 318,483		$ 186,095	$ 188,169	$ 186,805
Liabilities
Deferred tax liability		$ 9,600
Cloverleaf
Assets
Land	60,494	59,363
Land	1,131
Buildings and improvements	668,151	687,821
Buildings and improvements	(19,670)
Machinery and equipment	145,647	144,825
Machinery and equipment	822
Assets under construction	16,974	20,968
Assets under construction	(3,994)
Operating lease right-of-use assets	1,254	1,254
Operating lease right-of-use assets	0
Cash and cash equivalents	4,332	4,332
Cash and cash equivalents	0
Restricted cash	526	0
Restricted cash	526
Accounts receivable	21,578	21,358
Accounts receivable	220
Goodwill	125,940	107,643
Goodwill	18,297
Acquired identifiable intangibles:
Other assets	7,052	18,720
Other assets	(11,668)
Total assets	1,303,917	1,309,645
Total assets	(5,728)
Liabilities
Accounts payable and accrued expenses	43,503	30,905
Accounts payable and accrued expenses	12,598
Notes payable	3,878	17,179
Notes payable	(13,301)
Operating lease obligations	1,254	1,254
Operating lease obligations	0
Unearned revenue	3,536	3,536
Unearned revenue	0
Pension and postretirement benefits	0	2,020
Pension and postretirement benefits	(2,020)
Deferred tax liability	8,868	9,063
Deferred tax liability	(195)
Total liabilities	61,039	63,957
Total liabilities	(2,918)
Total consideration	1,242,878	1,245,688
Total consideration for Cloverleaf acquisition	(2,810)
Cloverleaf | Customer Relationships
Acquired identifiable intangibles:
Acquired identifiable intangibles	250,346	241,738
Acquired identifiable intangibles	8,608
Cloverleaf | Trademarks and Trade Names
Acquired identifiable intangibles:
Acquired identifiable intangibles	1,623	1,623
Acquired identifiable intangibles	$ 0
Lanier Cold Storage
Assets
Goodwill		6,400
Lanier Cold Storage | Customer Relationships
Acquired identifiable intangibles:
Acquired identifiable intangibles		$ 16,300