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Summary of Significant Accounting Policies - Income Per Share, Allowance for Doubful Accounts, Income Taxes, and Concentration of Credit Risk (Details) (USD $)
|
3 Months Ended |
|
|
Mar. 31, 2015
bank
fund
|
Mar. 31, 2014
|
Dec. 31, 2014
fund
bank
|
| Income (Loss) Per Share-Basic and Diluted |
|
|
|
| Income (loss) from continuing operations |
$ 41,739,000 |
$ 42,721,000 |
|
| Total (loss) income from discontinued operations |
0 |
(612,000) |
|
| Net income (loss) attributable to Iron Mountain Incorporated |
41,096,000 |
41,667,000 |
|
| Weighted-average shares—basic |
210,237,000 |
191,879,000 |
|
| Effect of dilutive potential stock options (in shares) |
1,223,330 |
682,801 |
|
| Effect of dilutive potential restricted stock, RSUs and PUs (in shares) |
788,758 |
507,219 |
|
| Weighted-average shares—diluted |
212,249,088 |
193,069,020 |
|
| Earnings (Losses) per share-basic: |
|
|
|
| Income (Loss) from continuing operations (in dollars per share) |
$ 0.20 |
$ 0.22 |
|
| Total (loss) income income discontinued operations (see Note 9) (in dollars per share) |
$ 0.00 |
$ 0.00 |
|
| Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share) |
$ 0.20 |
$ 0.22 |
|
| Earnings (Losses) per share-diluted: |
|
|
|
| Income (Loss) from continuing operations (in dollars per share) |
$ 0.20 |
$ 0.22 |
|
| Total (loss) income from discontinued operations (see Note 9) (in dollars per share) |
$ 0.00 |
$ 0.00 |
|
| Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share) |
$ 0.19 |
$ 0.22 |
|
| Antidilutive stock options, RSUs and PUs, excluded from the calculation (in shares) |
358,233 |
1,380,962 |
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| Allowance for Doubtful Accounts and Credit Memo Reserves |
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|
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| The general period to charge-off uncollectible balances of receivable, as circumstances warrant, is no later than this period of time past due |
1 year |
|
|
| Income Taxes: |
|
|
|
| Period of time subject to a separate corporate income tax |
10 years |
|
|
| Increase (decrease) in gross interest and penalties recorded |
942,000 |
966,000 |
|
| Accrued interest and penalties recorded |
6,167,000 |
|
5,884,000 |
| Effective tax rates (as a percent) |
27.60% |
45.80% |
|
| Federal statutory tax rate (as a percent) |
|
35.00% |
|
| Effective tax rate increase (decrease) (as a percent) |
|
1.10% |
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| FX impact on increase (decrease) in effective income tax rate (as a percent) |
|
1.30% |
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| Concentrations of Credit Risk |
|
|
|
| Number of global banks with cash, cash equivalent and restricted cash held on deposit |
3 |
|
3 |
| Number of "Triple A" rated money market funds with cash, cash equivalent and restricted cash held on deposit |
1 |
|
2 |
| Maximum investment limit in any one mutual fund |
50,000,000 |
|
|
| Maximum investment limit in any one financial institution |
75,000,000 |
|
|
| Cash, cash equivalent and restricted cash |
139,605,000 |
|
159,793,000 |
| Money market funds and time deposits |
$ 33,909,000 |
|
$ 53,032,000 |