CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands							3 Months Ended		6 Months Ended
	May. 28, 2015	Feb. 19, 2015	Nov. 17, 2014	Sep. 15, 2014	May. 28, 2014	Mar. 14, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Storage rental							$ 461,209	$ 466,889	$ 920,081	$ 925,778
Service							298,525	320,003	588,939	631,240
Total Revenues							759,734	786,892	1,509,020	1,557,018
Operating Expenses:
Cost of sales (excluding depreciation and amortization)							326,283	336,961	647,937	672,106
Selling, general and administrative							215,885	213,807	412,299	428,587
Depreciation and amortization							87,549	88,941	173,500	175,374
(Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net							515	(107)	848	1,045
Total Operating Expenses							630,232	639,602	1,234,584	1,277,112
Operating Income (Loss)							129,502	147,290	274,436	279,906
Interest Income (Expense), Net							66,087	62,201	130,985	124,513
Other (Income) Expense, Net							2,004	(4,838)	24,353	479
Income (Loss) from Continuing Operations Before (Benefit) Provision for Income Taxes							61,411	89,927	119,098	154,914
(Benefit) Provision for Income Taxes							7,404	(182,775)	23,352	(153,041)
Gain on Sale of Real Estate, Net of Tax									0	(7,468)
Income (Loss) from Continuing Operations							54,007	272,702	95,746	315,423
(Loss) Income from Discontinued Operations, Net of Tax							0	(326)	0	(938)
Net Income (Loss)							54,007	272,376	95,746	314,485
Less: Net Income (Loss) Attributable to Noncontrolling Interests							677	739	1,320	1,181
Net Income (Loss) Attributable to Iron Mountain Incorporated							$ 53,330	$ 271,637	$ 94,426	$ 313,304
Earnings (Losses) per Share—Basic:
Income (Loss) from Continuing Operations (in dollars per share)							$ 0.26	$ 1.42	$ 0.45	$ 1.64
Total Income (Loss) from Discontinued Operations (in dollars per share)							0.00	0.00	0.00	0.00
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)							0.25	1.41	0.45	1.63
Earnings (Losses) per Share-Diluted:
Income (Loss) from Continuing Operations (in dollars per share)							0.25	1.41	0.45	1.63
Total Income (Loss) from Discontinued Operations (in dollars per share)							0.00	0.00	0.00	0.00
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)							$ 0.25	$ 1.40	$ 0.45	$ 1.62
Weighted Average Common Shares Outstanding-Basic (in shares)							210,699	192,381	210,468	192,130
Weighted Average Common Shares Outstanding-Diluted (in shares)							212,077	193,526	212,163	193,298
Dividends Declared per Common Share (in dollars per share)	$ 0.4750	$ 0.475	$ 0.475	$ 0.475	$ 0.2700	$ 0.2700	$ 0.4752	$ 0.2705	$ 0.9499	$ 0.5405