CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 271,424	$ 258,693
Restricted cash	35,108	35,105
Accounts receivable (less allowances of $23,258 and $21,545, respectively)	577,616	533,070
Deferred income taxes	51,702	37,565
Prepaid expenses and other	120,670	138,643
Assets of discontinued operations (see Note 10)	13,126	202,726
Total Current Assets	1,069,646	1,205,802
Property, Plant and Equipment:
Property, plant and equipment	4,298,306	4,178,652
Less-Accumulated depreciation	(1,820,107)	(1,702,825)
Property, Plant and Equipment, net	2,478,199	2,475,827
Other Assets, net:
Goodwill	2,358,129	2,282,137
Customer relationships and acquisition costs	450,108	387,779
Deferred financing costs	32,103	29,146
Other	22,514	29,042
Total Other Assets, net	2,862,854	2,728,104
Total Assets	6,410,699	6,409,733
Current Liabilities:
Current portion of long-term debt	66,199	96,603
Accounts payable	133,633	145,089
Accrued expenses	422,402	385,056
Deferred revenue	172,816	173,676
Liabilities of discontinued operations (see Note 10)	3,342	57,222
Total Current Liabilities	798,392	857,646
Long-term Debt, net of current portion	2,866,920	2,912,465
Other Long-term Liabilities	85,732	86,605
Deferred Rent	95,709	95,860
Deferred Income Taxes	501,837	493,895
Commitments and Contingencies (see Note 8)
Iron Mountain Incorporated Stockholders' Equity:
Preferred stock (par value $0.01; authorized 10,000,000 shares; none issued and outstanding)
Common stock (par value $0.01; authorized 400,000,000 shares; issued and outstanding 202,871,443 shares and 200,064,066 shares, respectively)	2,029	2,001
Additional paid-in capital	1,047,150	1,228,655
Retained earnings	933,626	695,707
Accumulated other comprehensive items, net	70,801	29,482
Total Iron Mountain Incorporated Stockholders' Equity	2,053,606	1,955,845
Noncontrolling Interests	8,503	7,417
Total Equity	2,062,109	1,963,262
Total Liabilities and Equity	$ 6,410,699	$ 6,409,733