CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 161,439	$ 205,063
Accounts receivable (less allowances of $60,214 and $56,981 as of September 30, 2021 and December 31, 2020, respectively)	884,348	859,344
Prepaid expenses and other	223,266	205,380
Total Current Assets	1,269,053	1,269,787
Property, Plant and Equipment:
Property, plant and equipment	8,503,171	8,246,337
Less—Accumulated depreciation	(3,914,553)	(3,743,894)
Property, Plant and Equipment, Net	4,588,618	4,502,443
Other Assets, Net:
Goodwill	4,472,641	4,557,609
Customer relationships, customer inducements and data center lease-based intangibles	1,230,330	1,326,977
Operating lease right-of-use assets	2,308,047	2,196,502
Other	365,706	295,949
Total Other Assets, Net	8,376,724	8,377,037
Total Assets	14,234,395	14,149,267
Current Liabilities:
Current portion of long-term debt	318,144	193,759
Accounts payable	324,210	359,863
Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)	926,360	1,146,288
Deferred revenue	257,593	295,785
Total Current Liabilities	1,826,307	1,995,695
Long-term Debt, net of current portion	8,815,273	8,509,555
Long-term Operating Lease Liabilities, net of current portion	2,164,449	2,044,598
Other Long-term Liabilities	155,048	204,508
Deferred Income Taxes	236,782	198,377
Commitments and Contingencies
Redeemable Noncontrolling Interests	61,390	59,805
Equity:
Preferred stock (par value $0.01; authorized 10,000,000 shares; none issued and outstanding)	0	0
Common stock (par value $0.01; authorized 400,000,000 shares; issued and outstanding 289,546,146 and 288,273,049 shares as of September 30, 2021 and December 31, 2020, respectively)	2,895	2,883
Additional paid-in capital	4,407,253	4,340,078
(Distributions in excess of earnings) Earnings in excess of distributions	(3,101,813)	(2,950,339)
Accumulated other comprehensive items, net	(334,453)	(255,893)
Total Iron Mountain Incorporated Stockholders' Equity	973,882	1,136,729
Noncontrolling Interests	1,264	0
Total Equity	975,146	1,136,729
Total Liabilities and Equity	$ 14,234,395	$ 14,149,267