Segment Information - Revenues by Product and Service Lines by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Total Revenues	$ 1,130,148	$ 1,036,647	$ 3,331,944	$ 3,087,617
GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	995,577	921,773	2,955,803	2,755,294
GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	88,587	72,814	236,672	206,939
CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	45,984	42,060	139,469	125,384
Records management
Segment Reporting Information [Line Items]
Total Revenues	797,512	737,902	2,376,461	2,194,442
Records management | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	767,059	712,182	2,285,000	2,118,767
Records management | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Records management | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	30,453	25,720	91,461	75,675
Data management
Segment Reporting Information [Line Items]
Total Revenues	130,792	138,276	399,922	416,802
Data management | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	115,261	121,936	351,914	367,093
Data management | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Data management | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	15,531	16,340	48,008	49,709
Information destruction
Segment Reporting Information [Line Items]
Total Revenues	113,257	87,655	318,889	269,434
Information destruction | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	113,257	87,655	318,889	269,434
Information destruction | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Information destruction | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Data Center(1)
Segment Reporting Information [Line Items]
Total Revenues	88,587	72,814	236,672	206,939
Data Center(1) | GLOBAL RIM BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	0	0	0	0
Data Center(1) | GLOBAL DATA CENTER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	88,587	72,814	236,672	206,939
Data Center(1) | CORPORATE AND OTHER BUSINESS
Segment Reporting Information [Line Items]
Total Revenues	$ 0	$ 0	$ 0	$ 0