Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Activity in real estate facilities during the years ended December 31, 2020 and 2019 is as follows:


	2020		2019
	(In thousands)
Operating facilities, at cost:
Beginning balance	$	3,729,589	$	2,575,367
Capital expenditures	287,220		177,268
Acquisitions	1,662,650		975,045
Newly developed warehouse facilities	58,807		21,316
Disposition	(62,225)		(7,409)
Impairment	(2,153)		(12,555)
Conversion of leased assets to owned	7,956		—
Impact of foreign exchange rate changes	24,916		557
Ending balance	5,706,760		3,729,589
Accumulated depreciation:
Beginning balance	(936,422)		(827,892)
Depreciation expense	(146,237)		(114,512)
Dispositions	8,731		6,679
Impact of foreign exchange rate changes	(6,994)		(697)
Ending balance	(1,080,922)		(936,422)
Total real estate facilities	$	4,625,838	$	2,793,167

Non-real estate assets	296,212		197,835
Total property, buildings and equipment and finance leases, net	$	4,922,050	$	2,991,002

Restricted cash balances as of December 31, 2020 and 2019 are as follows:


	2020		2019
	(In thousands)
2013 mortgage notes’ escrow accounts	$	1,157	$	877
2013 mortgage notes’ cash managed accounts	2,393		2,343
Cash on deposit for workers’ compensation program in Australia	3,034		2,525
New market tax credit reserve accounts	584		565
Cash on deposit for workers’ compensation program in United States	1,390		—
Agro Europe	2,956		—
Total restricted cash	$	11,514	$	6,310

The following table provides a summary of activity of the allowance for doubtful accounts:


	Balance at beginning of year		Charged to expense/against revenue	Amounts written off, net of recoveries	Balance at end of year
Allowance for doubtful accounts:	(In thousands)
Year ended December 31, 2018	$	5,309	1,969	(1,572)	$	5,706
Year ended December 31, 2019	$	5,706	3,608	(2,387)	$	6,927
Year ended December 31, 2020	$	6,927	7,161	(1,802)	$	12,286