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Selected Consolidated Financial Statements of Parent, Guarantors, and Non-Guarantors - Consolidated Statement of Operations and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 01, 2017 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Storage rental |  |  |  |  |  |  |  |  |  | $ 2,681,087 |  |
Intercompany revenues |  |  |  |  |  |  |  |  |  | 0 | $ 0 | $ 0
Revenues |  |  |  |  |  | $ 1,061,489 | $ 1,060,991 | $ 1,060,823 | $ 1,042,458 |  | 4,225,761 | 3,845,578
Total Revenues |  | $ 1,079,590 | $ 1,062,224 | $ 1,066,907 | $ 1,053,863 |  |  |  |  | 4,262,584 |  |
Operating Expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales (excluding depreciation and amortization) |  |  |  |  |  |  |  |  |  | 1,833,315 | 1,793,954 | 1,664,825
Intercompany cost of sales |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Selling, general and administrative |  |  |  |  |  |  |  |  |  | 991,664 | 1,006,983 | 937,180
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 658,201 | 639,514 | 522,376
Significant Acquisition Costs |  |  |  |  |  |  |  |  |  | 13,293 | 50,665 | 84,901
Intangible impairments | $ 3,011 |  |  |  |  |  |  |  |  | 0 | 0 | 3,011
Restructuring Charges |  | 48,600 |  |  |  |  |  |  |  | 48,597 | 0 | 0
(Gain) Loss on disposal/write-down of property, plant and equipment, net |  |  |  |  |  |  |  |  |  | (63,824) | (73,622) | (766)
Total Operating Expenses |  |  |  |  |  |  |  |  |  | 3,481,246 | 3,417,494 | 3,211,527
Operating (Loss) Income |  | 206,074 | 223,474 | 193,115 | 158,675 | 254,053 | 195,635 | 201,460 | 157,119 | 781,338 | 808,267 | 634,051
Interest Expense (Income), Net |  |  |  |  |  |  |  |  |  | 419,298 | 409,648 | 353,645
Other Expense (Income), Net |  |  |  |  |  |  |  |  |  | 33,898 | (11,692) | 79,429
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 328,142 | 410,311 | 200,977
Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 59,931 | 42,753 | 22,962
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (Loss) from Continuing Operations |  | 37,104 | 108,284 | 92,347 | 30,476 | 158,557 | 77,349 | 92,263 | 39,389 | 268,211 | 367,558 | 178,015
Income (Loss) from Discontinued Operations, Net of Tax |  | 0 | 0 | 128 | (24) | 0 | (11,605) | (360) | (462) | 104 | (12,427) | (6,291)
Net Income (Loss) |  | 37,104 | 108,284 | 92,475 | 30,452 | 158,557 | 65,744 | 91,903 | 38,927 | 268,315 | 355,131 | 171,724
Less: Net Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 938 | 1,198 | 1,611
Net Income (Loss) Attributable to Iron Mountain Incorporated |  | 37,700 | 107,675 | 92,441 | 29,561 | 157,844 | 65,869 | 91,761 | 38,459 | 267,377 | 353,933 | 170,113
Net Income (Loss) |  | $ 37,104 | $ 108,284 | $ 92,475 | $ 30,452 | $ 158,557 | $ 65,744 | $ 91,903 | $ 38,927 | 268,315 | 355,131 | 171,724
Other Comprehensive Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  | 11,994 | (164,107) | 108,564
Change in Fair Value of Derivative Instruments |  |  |  |  |  |  |  |  |  | (8,783) | (973) |
Equity in Other Comprehensive (Loss) Income of Subsidiaries |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 3,211 | (165,080) | 108,564
Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 271,526 | 190,051 | 280,288
Comprehensive Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 1,066 | (2,207) | 1,591
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | 270,460 | 192,258 | 278,697
Eliminations |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Storage rental |  |  |  |  |  |  |  |  |  | 0 |  |
Intercompany revenues |  |  |  |  |  |  |  |  |  | (24,901) | (23,198) | (29,190)
Revenues |  |  |  |  |  |  |  |  |  |  | (23,198) | (29,190)
Total Revenues |  |  |  |  |  |  |  |  |  | (24,901) |  |
Operating Expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales (excluding depreciation and amortization) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intercompany cost of sales |  |  |  |  |  |  |  |  |  | (24,901) | (23,198) | (29,190)
Selling, general and administrative |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Significant Acquisition Costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intangible impairments |  |  |  |  |  |  |  |  |  |  |  | 0
Restructuring Charges |  |  |  |  |  |  |  |  |  | 0 |  |
(Gain) Loss on disposal/write-down of property, plant and equipment, net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total Operating Expenses |  |  |  |  |  |  |  |  |  | (24,901) | (23,198) | (29,190)
Operating (Loss) Income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest Expense (Income), Net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other Expense (Income), Net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | 545,610 | 703,625 | 392,835
Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  | (545,610) | (703,625) | (392,835)
Income (Loss) from Discontinued Operations, Net of Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net Income (Loss) |  |  |  |  |  |  |  |  |  | (545,610) | (703,625) | (392,835)
Less: Net Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | (545,610) | (703,625) | (392,835)
Net Income (Loss) |  |  |  |  |  |  |  |  |  | (545,610) | (703,625) | (392,835)
Other Comprehensive Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Change in Fair Value of Derivative Instruments |  |  |  |  |  |  |  |  |  | 0 | 0 |
Equity in Other Comprehensive (Loss) Income of Subsidiaries |  |  |  |  |  |  |  |  |  | (11,577) | 311,743 | (205,726)
Total Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | (11,577) | 311,743 | (205,726)
Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | (557,187) | (391,882) | (598,561)
Comprehensive Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | (557,187) | (391,882) | (598,561)
Parent | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Storage rental |  |  |  |  |  |  |  |  |  | 0 |  |
Intercompany revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Revenues |  |  |  |  |  |  |  |  |  |  | 0 | 0
Total Revenues |  |  |  |  |  |  |  |  |  | 0 |  |
Operating Expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales (excluding depreciation and amortization) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intercompany cost of sales |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Selling, general and administrative |  |  |  |  |  |  |  |  |  | 444 | (288) | 161
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 91 | 122 | 167
Significant Acquisition Costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intangible impairments |  |  |  |  |  |  |  |  |  |  |  | 0
Restructuring Charges |  |  |  |  |  |  |  |  |  | 0 |  |
(Gain) Loss on disposal/write-down of property, plant and equipment, net |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total Operating Expenses |  |  |  |  |  |  |  |  |  | 535 | (166) | 328
Operating (Loss) Income |  |  |  |  |  |  |  |  |  | (535) | 166 | (328)
Interest Expense (Income), Net |  |  |  |  |  |  |  |  |  | 213,149 | 199,955 | 163,541
Other Expense (Income), Net |  |  |  |  |  |  |  |  |  | 59 | 2,328 | 47,176
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | (213,743) | (202,117) | (211,045)
Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | (481,120) | (556,050) | (381,158)
Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  | 267,377 | 353,933 | 170,113
Income (Loss) from Discontinued Operations, Net of Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net Income (Loss) |  |  |  |  |  |  |  |  |  | 267,377 | 353,933 | 170,113
Less: Net Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | 267,377 | 353,933 | 170,113
Net Income (Loss) |  |  |  |  |  |  |  |  |  | 267,377 | 353,933 | 170,113
Other Comprehensive Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  | 6,003 | 11,070 | (15,015)
Change in Fair Value of Derivative Instruments |  |  |  |  |  |  |  |  |  | (8,783) | (973) |
Equity in Other Comprehensive (Loss) Income of Subsidiaries |  |  |  |  |  |  |  |  |  | 5,863 | (171,772) | 123,599
Total Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 3,083 | (161,675) | 108,584
Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 270,460 | 192,258 | 278,697
Comprehensive Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | 270,460 | 192,258 | 278,697
Guarantors | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Storage rental |  |  |  |  |  |  |  |  |  | 1,654,359 |  |
Intercompany revenues |  |  |  |  |  |  |  |  |  | 4,668 | 4,759 | 4,577
Revenues |  |  |  |  |  |  |  |  |  |  | 2,585,318 | 2,314,114
Total Revenues |  |  |  |  |  |  |  |  |  | 2,637,254 |  |
Operating Expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales (excluding depreciation and amortization) |  |  |  |  |  |  |  |  |  | 1,048,514 | 1,009,890 | 922,008
Intercompany cost of sales |  |  |  |  |  |  |  |  |  | 20,233 | 18,439 | 24,613
Selling, general and administrative |  |  |  |  |  |  |  |  |  | 679,964 | 679,740 | 613,350
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 410,524 | 404,574 | 310,962
Significant Acquisition Costs |  |  |  |  |  |  |  |  |  | 7,055 | 35,607 | 52,621
Intangible impairments |  |  |  |  |  |  |  |  |  |  |  | 3,011
Restructuring Charges |  |  |  |  |  |  |  |  |  | 32,218 |  |
(Gain) Loss on disposal/write-down of property, plant and equipment, net |  |  |  |  |  |  |  |  |  | (26,472) | (2,841) | (1,001)
Total Operating Expenses |  |  |  |  |  |  |  |  |  | 2,172,036 | 2,145,409 | 1,925,564
Operating (Loss) Income |  |  |  |  |  |  |  |  |  | 465,218 | 439,909 | 388,550
Interest Expense (Income), Net |  |  |  |  |  |  |  |  |  | 18,923 | 6,392 | 7,606
Other Expense (Income), Net |  |  |  |  |  |  |  |  |  | 19,271 | 17,158 | 9,178
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 427,024 | 416,359 | 371,766
Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 6,698 | (1,006) | 3,988
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | (64,490) | (147,575) | (11,677)
Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  | 484,816 | 564,940 | 379,455
Income (Loss) from Discontinued Operations, Net of Tax |  |  |  |  |  |  |  |  |  | 120 | (12,283) | (4,370)
Net Income (Loss) |  |  |  |  |  |  |  |  |  | 484,936 | 552,657 | 375,085
Less: Net Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | 484,936 | 552,657 | 375,085
Net Income (Loss) |  |  |  |  |  |  |  |  |  | 484,936 | 552,657 | 375,085
Other Comprehensive Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Change in Fair Value of Derivative Instruments |  |  |  |  |  |  |  |  |  | 0 | 0 |
Equity in Other Comprehensive (Loss) Income of Subsidiaries |  |  |  |  |  |  |  |  |  | 5,714 | (139,971) | 82,127
Total Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 5,714 | (139,971) | 82,127
Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 490,650 | 412,686 | 457,212
Comprehensive Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | 490,650 | 412,686 | 457,212
Non-Guarantor Subsidiaries | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Storage rental |  |  |  |  |  |  |  |  |  | 1,026,728 |  |
Intercompany revenues |  |  |  |  |  |  |  |  |  | 20,233 | 18,439 | 24,613
Revenues |  |  |  |  |  |  |  |  |  |  | 1,663,641 | 1,560,654
Total Revenues |  |  |  |  |  |  |  |  |  | 1,650,231 |  |
Operating Expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales (excluding depreciation and amortization) |  |  |  |  |  |  |  |  |  | 784,801 | 784,064 | 742,817
Intercompany cost of sales |  |  |  |  |  |  |  |  |  | 4,668 | 4,759 | 4,577
Selling, general and administrative |  |  |  |  |  |  |  |  |  | 311,256 | 327,531 | 323,669
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 247,586 | 234,818 | 211,247
Significant Acquisition Costs |  |  |  |  |  |  |  |  |  | 6,238 | 15,058 | 32,280
Intangible impairments |  |  |  |  |  |  |  |  |  |  |  | 0
Restructuring Charges |  |  |  |  |  |  |  |  |  | 16,379 |  |
(Gain) Loss on disposal/write-down of property, plant and equipment, net |  |  |  |  |  |  |  |  |  | (37,352) | (70,781) | 235
Total Operating Expenses |  |  |  |  |  |  |  |  |  | 1,333,576 | 1,295,449 | 1,314,825
Operating (Loss) Income |  |  |  |  |  |  |  |  |  | 316,655 | 368,192 | 245,829
Interest Expense (Income), Net |  |  |  |  |  |  |  |  |  | 187,226 | 203,301 | 182,498
Other Expense (Income), Net |  |  |  |  |  |  |  |  |  | 14,568 | (31,178) | 23,075
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 114,861 | 196,069 | 40,256
Provision (Benefit) for Income Taxes |  |  |  |  |  |  |  |  |  | 53,233 | 43,759 | 18,974
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (Loss) from Continuing Operations |  |  |  |  |  |  |  |  |  | 61,628 | 152,310 | 21,282
Income (Loss) from Discontinued Operations, Net of Tax |  |  |  |  |  |  |  |  |  | (16) | (144) | (1,921)
Net Income (Loss) |  |  |  |  |  |  |  |  |  | 61,612 | 152,166 | 19,361
Less: Net Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 938 | 1,198 | 1,611
Net Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | 60,674 | 150,968 | 17,750
Net Income (Loss) |  |  |  |  |  |  |  |  |  | 61,612 | 152,166 | 19,361
Other Comprehensive Income (Loss): |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Translation Adjustment |  |  |  |  |  |  |  |  |  | 5,991 | (175,177) | 123,579
Change in Fair Value of Derivative Instruments |  |  |  |  |  |  |  |  |  | 0 | 0 |
Equity in Other Comprehensive (Loss) Income of Subsidiaries |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 5,991 | (175,177) | 123,579
Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |  | 67,603 | (23,011) | 142,940
Comprehensive Income (Loss) Attributable to Noncontrolling Interests |  |  |  |  |  |  |  |  |  | 1,066 | (2,207) | 1,591
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated |  |  |  |  |  |  |  |  |  | 66,537 | (20,804) | 141,349
Storage rental |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 2,622,455 | 2,377,557
Storage rental | Eliminations |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 0 | 0
Storage rental | Parent | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 0 | 0
Storage rental | Guarantors | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 1,606,346 | 1,443,219
Storage rental | Non-Guarantor Subsidiaries | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  | 1,016,109 | 934,338
Service |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 1,581,497 | 1,603,306 | 1,468,021
Service | Eliminations |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Service | Parent | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Service | Guarantors | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 978,227 | 974,213 | 866,318
Service | Non-Guarantor Subsidiaries | Reportable legal entities |  |  |  |  |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | $ 603,270 | $ 629,093 | $ 601,703

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