CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 229,999	$ 243,415
Restricted cash	33,613	33,612
Accounts receivable (less allowances of $25,209 and $26,939 as of December 31, 2012 and March 31, 2013, respectively)	571,402	572,200
Deferred income taxes		10,152
Prepaid expenses and other	166,122	164,713
Total Current Assets	1,001,136	1,024,092
Property, Plant and Equipment:
Property, plant and equipment	4,470,141	4,443,323
Less-Accumulated depreciation	(1,992,030)	(1,965,596)
Property, Plant and Equipment, net	2,478,111	2,477,727
Other Assets, net:
Goodwill	2,308,720	2,334,759
Customer relationships and acquisition costs	446,289	456,120
Deferred financing costs	42,488	43,850
Other	21,436	21,791
Total Other Assets, net	2,818,933	2,856,520
Total Assets	6,298,180	6,358,339
Current Liabilities:
Current portion of long-term debt	91,853	92,887
Accounts payable	168,590	168,120
Accrued expenses	369,401	426,813
Deferred revenue	214,734	217,133
Total Current Liabilities	844,578	904,953
Long-term Debt, net of current portion	3,757,853	3,732,116
Other Long-term Liabilities	66,397	62,917
Deferred Rent	93,145	97,356
Deferred Income Taxes	408,130	398,549
Commitments and Contingencies (see Note 7)
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 190,005,788 shares and 190,611,865 shares as of December 31, 2012 and March 31, 2013, respectively)	1,906	1,900
Additional paid-in capital	954,801	942,199
Retained earnings	152,496	185,558
Accumulated other comprehensive items, net	5,352	20,314
Total Iron Mountain Incorporated Stockholders' Equity	1,114,555	1,149,971
Noncontrolling Interests	13,522	12,477
Total Equity	1,128,077	1,162,448
Total Liabilities and Equity	$ 6,298,180	$ 6,358,339