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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Property, Plant and Equipment at cost | Property, plant and equipment are stated at cost and depreciated using the straight-line method with the following useful lives (in years):
| Range
Buildings and building improvements | 5 to 40
Leasehold improvements | 5 to 10 or life of the lease (whichever is shorter)
Racking | 1 to 20 or life of the lease (whichever is shorter)
Warehouse equipment/vehicles | 1 to 10
Furniture and fixtures | 1 to 10
Computer hardware and software | 2 to 5
Property, plant and equipment (including capital leases in the respective category), at cost, consist of the following:
| December 31,
| 2017 |  | 2018
Land | $ | 314,897 |  |  | $ | 400,980 |
Buildings and building improvements | 2,039,902 |  |  | 2,991,307 |
Leasehold improvements | 592,700 |  |  | 770,666 |
Racking | 1,996,594 |  |  | 2,001,831 |
Warehouse equipment/vehicles | 467,345 |  |  | 481,515 |
Furniture and fixtures | 55,245 |  |  | 56,207 |
Computer hardware and software | 627,571 |  |  | 680,283 |
Construction in progress | 156,846 |  |  | 218,160 |
| $ | 6,251,100 |  |  | $ | 7,600,949 |
Schedule of carrying value of goodwill, net for each of the reporting units | The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2017 is as follows:
| Carrying Value as of December 31, 2017
North American Records and Information Management(1) | $ | 2,269,446 |
North American Data Management(2) | 497,851 |
Consumer Storage(3) | — |
Fine Arts(3) | 25,298 |
Entertainment Services(3) | 34,750 |
Western Europe(4) | 396,489 |
NEE and MEAI(5) | 188,265 |
Latin America(5) | 155,115 |
Australia and New Zealand(5) | 316,883 |
Asia(5) | 186,170 |
Global Data Center(6) | — |
Total | $ | 4,070,267 |
_______________________________________________________________________________ (1) This reporting unit is included in the North American Records and Information Management Business segment. (2) This reporting unit is included in the North American Data Management Business segment. (3) This reporting unit is included in the Corporate and Other Business segment. (4) This reporting unit is included in the Western European Business segment. (5) This reporting unit is included in the Other International Business segment. (6) This reporting unit is included in the Global Data Center Business segment. The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2018 is as follows:
| Carrying Value as of December 31, 2018
North American Records and Information Management(1) | $ | 2,251,795 |
North American Data Management(2) | 493,491 |
Consumer Storage(3) | — |
Fine Arts(3) | 35,526 |
Entertainment Services(3) | 34,233 |
Western Europe(4) | 381,806 |
NEE and MEI(5) | 169,780 |
Latin America(5) | 136,099 |
ANZ SA(5) | 300,204 |
Asia(5) | 212,140 |
Global Data Center(6) | 425,956 |
Total | $ | 4,441,030 |
_______________________________________________________________________________ (1) This reporting unit is included in the North American Records and Information Management Business segment. (2) This reporting unit is included in the North American Data Management Business segment. (3) This reporting unit is included in the Corporate and Other Business segment. (4) This reporting unit is included in the Western European Business segment. (5) This reporting unit is included in the Other International Business segment. (6) This reporting unit is included in the Global Data Center Business segment.
Schedule of changes in the carrying value of goodwill attributable to each reportable operating segment | The changes in the carrying value of goodwill attributable to each reportable operating segment for the years ended December 31, 2017 and 2018 is as follows:
| North American Records and Information Management Business |  | North American Data Management Business |  | Western European Business |  | Other International Business |  | Global Data Center Business |  | Corporate and Other Business |  | Total Consolidated
Goodwill balance, net of accumulated amortization, as of December 31, 2016 | $ | 2,280,911 |  |  | $ | 493,966 |  |  | $ | 349,421 |  |  | $ | 743,077 |  |  | $ | — |  |  | $ | 37,646 |  |  | $ | 3,905,021 |
Deductible goodwill acquired during the year | 894 |  |  | — |  |  | — |  |  | 9,274 |  |  | — |  |  | 717 |  |  | 10,885 |
Non-deductible goodwill acquired during the year | — |  |  | — |  |  | — |  |  | 24,970 |  |  | — |  |  | 24,533 |  |  | 49,503 |
Goodwill impairment | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (3,011 | ) |  | (3,011 | )
Goodwill allocated to Russia and Ukraine Divestment (see Note 13) | — |  |  | — |  |  | — |  |  | (3,515 | ) |  | — |  |  | — |  |  | (3,515 | )
Fair value and other adjustments(1) | (25,195 | ) |  | 208 |  |  | 10,536 |  |  | 21,079 |  |  | — |  |  | — |  |  | 6,628 |
Currency effects | 12,836 |  |  | 3,677 |  |  | 36,532 |  |  | 51,548 |  |  | — |  |  | 163 |  |  | 104,756 |
Goodwill balance, net of accumulated amortization, as of December 31, 2017 | 2,269,446 |  |  | 497,851 |  |  | 396,489 |  |  | 846,433 |  |  | — |  |  | 60,048 |  |  | 4,070,267 |
Deductible goodwill acquired during the year | — |  |  | — |  |  | — |  |  | 3,251 |  |  | — |  |  | 6,644 |  |  | 9,895 |
Non-deductible goodwill acquired during the year | — |  |  | — |  |  | 5,231 |  |  | 28,999 |  |  | 429,853 |  |  | 3,620 |  |  | 467,703 |
Goodwill allocated to IMFS Divestment (see Note 13) | (1,202 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,202 | )
Fair value and other adjustments(2) | (423 | ) |  | — |  |  | — |  |  | 4,283 |  |  | — |  |  | 609 |  |  | 4,469 |
Currency effects | (16,026 | ) |  | (4,360 | ) |  | (19,914 | ) |  | (64,743 | ) |  | (3,897 | ) |  | (1,162 | ) |  | (110,102 | )
Goodwill balance, net of accumulated amortization, as of December 31, 2018 | $ | 2,251,795 |  |  | $ | 493,491 |  |  | $ | 381,806 |  |  | $ | 818,223 |  |  | $ | 425,956 |  |  | $ | 69,759 |  |  | $ | 4,441,030 |
Accumulated Goodwill Impairment Balance as of December 31, 2017 | $ | 85,909 |  |  | $ | — |  |  | $ | 46,500 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,011 |  |  | $ | 135,420 |
Accumulated Goodwill Impairment Balance as of December 31, 2018 | $ | 85,909 |  |  | $ | — |  |  | $ | 46,500 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,011 |  |  | $ | 135,420 |
___________________________________________________________________
(1) | Total fair value and other adjustments primarily include net adjustments of $6,628 primarily related to property, plant and equipment, and customer relationship intangible assets.
(2) | Total fair value and other adjustments primarily include net adjustments of $(2,717) primarily related to property, plant and equipment, customer relationship intangible assets and deferred income taxes and other liabilities and $7,186 of cash paid related to certain acquisitions completed in 2017.
Components of amortizable intangible assets |
| December 31, 2017 |  | December 31, 2018
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Other finite-lived intangible assets (included in other assets, net) | $ | 20,929 |  |  | $ | (10,728 | ) |  | $ | 10,201 |  |  | $ | 20,310 |  |  | $ | (14,798 | ) |  | $ | 5,512 |
The gross carrying amount and accumulated amortization of our finite-lived intangible assets as of December 31, 2017 and 2018, respectively, are as follows:
| December 31, 2017 |  | December 31, 2018
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Assets: |  |  |  |  |  |  |  |  |  |  |
Customer relationship intangible assets | $ | 1,704,105 |  |  | $ | (395,278 | ) |  | $ | 1,308,827 |  |  | $ | 1,718,919 |  |  | $ | (455,705 | ) |  | $ | 1,263,214 |
Customer inducements(1) | 140,030 |  |  | (66,981 | ) |  | 73,049 |  |  | 56,478 |  |  | (34,181 | ) |  | 22,297 |
Data center lease-based intangible assets(2) | 19,314 |  |  | (643 | ) |  | 18,671 |  |  | 271,818 |  |  | (50,807 | ) |  | 221,011 |
Third-party commissions asset(3) | — |  |  | — |  |  | — |  |  | 30,071 |  |  | (1,089 | ) |  | 28,982 |
| $ | 1,863,449 |  |  | $ | (462,902 | ) |  | $ | 1,400,547 |  |  | $ | 2,077,286 |  |  | $ | (541,782 | ) |  | $ | 1,535,504 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Data center below-market leases | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 12,318 |  |  | $ | (1,642 | ) |  | $ | 10,676 |
_______________________________________________________________________________
(1) | The gross carrying amount, accumulated amortization and net carrying amount of customer inducements as of December 31, 2017 includes Free Move Costs, which were capitalized as Customer Inducements prior to the adoption of ASU 2014-09. Subsequent to the adoption of ASU 2014-09, Free Move Costs are considered Contract Fulfillment Costs and Customer Inducements consist exclusively of Permanent Withdrawal Fees. Contract Fulfillment Costs are included in Other, a component of Other assets, net, in the accompanying Consolidated Balance Sheet as of December 31, 2018. See Note 2.l. for information regarding Contract Fulfillment Costs included in our Consolidated Balance Sheet as of December 31, 2018.
(2) | Includes Data Center In-Place Leases, Data Center Tenant Relationships and Data Center Above-Market Leases.
(3) | Third-party commissions asset is included in Other, a component of Other assets, net in the accompanying Consolidated Balance Sheet as of December 31, 2018. See Note 6 for additional information on the third-party commissions asset.
Schedule of amortization expenses | Amortization expense associated with finite-lived intangible assets, revenue reduction associated with the amortization of Permanent Withdrawal Fees and net revenue reduction associated with the amortization of Data Center Above-Market Leases and Data Center Below-Market Leases for the years ended December 31, 2016, 2017 and 2018 are as follows:
|  | Year Ended December 31,
|  | 2016 |  | 2017 |  | 2018
Amortization expense included in depreciation and amortization associated with: |  |  |  |  |  |  |  |  |
Customer relationship and customer inducement intangible assets |  | $ | 84,349 |  |  | $ | 109,563 |  |  | $ | 113,782 |
Data center in-place leases and tenant relationships |  | — |  |  | — |  |  | 43,061 |
Other finite-lived intangible assets |  | 2,451 |  |  | 6,530 |  |  | 4,624 |
Third-party commissions asset |  | — |  |  | — |  |  | 1,089 |
Revenue reduction associated with amortization of: |  |  |  |  |  |  |  |  |
Permanent withdrawal fees |  | $ | 12,217 |  |  | $ | 11,253 |  |  | $ | 11,408 |
Data center above-market leases and data center below-market leases |  | — |  |  | — |  |  | 4,873 |
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years | Estimated amortization expense for existing finite-lived intangible assets (excluding deferred financing costs, as disclosed in Note 2.j. and Contract Fulfillment Costs, as defined and disclosed in Note 2.l.) is as follows:
| Estimated Amortization
| Included in Depreciation and Amortization |  | Revenue Reduction Associated with the Amortization of Permanent Withdrawal Fees |  | Revenue Reduction (Increase) Associated with Amortization of Data Center Above-market leases and Below-market leases
2019 | $ | 160,048 |  |  | $ | 7,386 |  |  | $ | 4,332 |
2020 | 155,324 |  |  | 5,705 |  |  | 1,260 |
2021 | 151,546 |  |  | 3,792 |  |  | 676 |
2022 | 121,459 |  |  | 1,667 |  |  | 157 |
2023 | 118,586 |  |  | 1,192 |  |  | (523 | )
Thereafter | 800,248 |  |  | 1,387 |  |  | (3,902 | )
Schedule of amortization of deferred financing costs | Estimated amortization expense for deferred financing costs, which are amortized as a component of interest expense, is as follows:
| Estimated Amortization of Deferred Financing Costs
2019 | $ | 15,544 |
2020 | 15,396 |
2021 | 14,272 |
2022 | 13,227 |
2023 | 10,108 |
Thereafter | 18,060 |
Components of prepaid expenses | Accrued expenses, with items greater than 5% of total current liabilities are shown separately, and consist of the following:
| December 31,
| 2017 |  | 2018
Interest | $ | 71,176 |  |  | $ | 83,854 |
Payroll and vacation | 67,379 |  |  | 65,846 |
Incentive compensation | 72,006 |  |  | 75,256 |
Sales tax and VAT payable | 63,725 |  |  | 96,564 |
Dividend | 172,102 |  |  | 181,986 |
Other | 206,758 |  |  | 249,178 |
Accrued expenses | $ | 653,146 |  |  | $ | 752,684 |
Schedule of new accounting pronouncements and changes in accounting principles | Deferred revenue liabilities are reflected as follows in our Consolidated Balance Sheets:
|  |  |  | December 31,
Description |  | Balance Sheet Location |  | 2017 |  | 2018
Deferred revenue - Current |  | Deferred revenue |  | $ | 241,590 |  |  | $ | 264,823 |
Deferred revenue - Long-term |  | Other Long-term Liabilities |  | — |  |  | 26,401 |
The Contract Fulfillment Costs recorded as a result of the adoption of ASU 2014-09 as of January 1, 2018 and December 31, 2018 are as follows:
|  |  |  | January 1, 2018 (Date of Adoption of ASU 2014-09) |  |  | December 31, 2018
Description |  | Location in Balance Sheet |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Intake Costs asset |  | Other (within Other Assets, Net) |  | $ | 31,604 |  |  | $ | (14,954 | ) |  | $ | 16,650 |  |  |  | $ | 39,748 |  |  | $ | (24,504 | ) |  | 15,244 |
Commissions asset |  | Other (within Other Assets, Net) |  | 42,072 |  |  | (21,173 | ) |  | 20,899 |  |  |  | 58,424 |  |  | (34,637 | ) |  | 23,787 |
The following table presents certain components of our Consolidated Statements of Operations for the year ended December 31, 2018 as reported and as if we had not adopted ASU 2014-09 on January 1, 2018:
| Year Ended December 31, 2018
| As Reported |  | If ASU 2014-09 was not adopted
Revenues | $ | 4,225,761 |  |  | $ | 4,219,663 |
Operating Income | $ | 755,508 |  |  | $ | 751,648 |
Income from Continuing Operations | $ | 376,976 |  |  | $ | 373,113 |
Per Share Income from Continuing Operations - Basic | $ | 1.31 |  |  | $ | 1.30 |
Per Share Income from Continuing Operations - Diluted | $ | 1.31 |  |  | $ | 1.30 |
Contract with customer, future amortization expense | Estimated amortization expense for Contract Fulfillment Costs is as follows:
| Estimated Amortization
2019 | $ | 21,227 |
2020 | 12,526 |
2021 | 5,278 |
Schedule of future minimum rental payments for operating leases | The future minimum lease payments to be received under non-cancellable data center operating leases, for which we are the lessor, excluding month to month leases, for the next five years are as follows:
| Future minimum lease payments
2019 | $ | 178,196 |
2020 | 138,216 |
2021 | 92,724 |
2022 | 71,784 |
2023 | 57,882 |
Stock-based compensation expense for Employee Stock-Based Awards related to continuing operations | Stock-based compensation expense for Employee Stock-Based Awards included in the accompanying Consolidated Statements of Operations is as follows:
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Cost of sales (excluding depreciation and amortization) | $ | 110 |  |  | $ | 108 |  |  | $ | 119 |
Selling, general and administrative expenses | 28,866 |  |  | 29,911 |  |  | 31,048 |
Total stock-based compensation | $ | 28,976 |  |  | $ | 30,019 |  |  | $ | 31,167 |
Schedule of weighted average assumptions | . The weighted average assumptions used for grants in the year ended December 31:
Weighted Average Assumptions |  | 2016 |  | 2017 |  | 2018
Expected volatility |  | 27.2 | % |  | 25.7 | % |  | 25.4 | %
Risk-free interest rate |  | 1.32 | % |  | 1.96 | % |  | 2.65 | %
Expected dividend yield |  | 7 | % |  | 6 | % |  | 7 | %
Expected life |  | 5.6 years |  |  | 5.0 years |  |  | 5.0 years |
Summary of stock option activity | A summary of our stock options outstanding as of December 31, 2018 by vesting terms is as follows:
| December 31, 2018
| Stock Options Outstanding |  | % of Stock Options Outstanding
Three-year vesting period (10 year contractual life) | 3,965,018 |  |  | 92.8 | %
Five-year vesting period (10 year contractual life) | 306,816 |  |  | 7.2 | %
| 4,271,834 |  |  | 100.0 | %
A summary of stock option activity for the year ended December 31, 2018 is as follows:
| Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
Outstanding at December 31, 2017 | 3,671,740 |  |  | $ | 34.41 |  |  |  |  |  |
Granted | 846,517 |  |  | 33.71 |  |  |  |  |  |
Exercised | (182,607 | ) |  | 22.36 |  |  |  |  |  |
Forfeited | (47,754 | ) |  | 34.69 |  |  |  |  |  |
Expired | (16,062 | ) |  | 34.69 |  |  |  |  |  |
Outstanding at December 31, 2018 | 4,271,834 |  |  | $ | 34.78 |  |  | 7.03 |  | $ | 6,066 |
Options exercisable at December 31, 2018 | 2,393,010 |  |  | $ | 34.51 |  |  | 5.97 |  | $ | 5,785 |
Options expected to vest | 1,808,321 |  |  | $ | 35.10 |  |  | 8.36 |  | $ | 279 |
Aggregate intrinsic value of stock options exercised | The aggregate intrinsic value of stock options exercised for the years ended December 31, 2016, 2017 and 2018 is as follows:
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Aggregate intrinsic value of stock options exercised | $ | 18,298 |  |  | $ | 8,485 |  |  | $ | 2,181 |
Summary of restricted stock and RSU activity | Cash dividends accrued and paid on RSUs for the years ended December 31, 2016, 2017 and 2018, are as follows:
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Cash dividends accrued on RSUs | $ | 2,525 |  |  | $ | 2,590 |  |  | $ | 2,899 |
Cash dividends paid on RSUs | 2,363 |  |  | 2,370 |  |  | 2,477 |
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Fair value of RSUs vested | $ | 22,236 |  |  | $ | 19,825 |  |  | $ | 20,454 |
A summary of RSU activity for the year ended December 31, 2018 is as follows:
| RSUs |  | Weighted- Average Grant-Date Fair Value
Non-vested at December 31, 2017 | 1,071,469 |  |  | $ | 35.38 |
Granted | 814,659 |  |  | 33.59 |
Vested | (582,687 | ) |  | 35.10 |
Forfeited | (106,875 | ) |  | 34.92 |
Non-vested at December 31, 2018 | 1,196,566 |  |  | $ | 34.33 |
Schedule of performance units | The fair value of earned PUs that vested during the years ended December 31, 2016, 2017 and 2018, is as follows:
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Fair value of earned PUs that vested | $ | 5,748 |  |  | $ | 1,242 |  |  | $ | 3,117 |
Cash dividends accrued and paid on PUs for the years ended December 31, 2016, 2017 and 2018, are as follows:
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Cash dividends accrued on PUs | $ | 1,078 |  |  | $ | 1,290 |  |  | $ | 1,804 |
Cash dividends paid on PUs | 645 |  |  | 205 |  |  | 644 |
Summary of performance unit (PU) activity | A summary of PU activity for the year ended December 31, 2018 is as follows:
| Original PU Awards |  | PU Adjustment(1) |  | Total PU Awards |  | Weighted- Average Grant-Date Fair Value
Non-vested at December 31, 2017 | 717,878 |  |  | (250,067 | ) |  | 467,811 |  |  | $ | 39.28 |
Granted | 353,507 |  |  | — |  |  | 353,507 |  |  | 33.64 |
Vested | (81,305 | ) |  | — |  |  | (81,305 | ) |  | 38.34 |
Forfeited/Performance or Market Conditions Not Achieved | (23,031 | ) |  | (49,881 | ) |  | (72,912 | ) |  | 38.01 |
Non-vested at December 31, 2018 | 967,049 |  |  | (299,948 | ) |  | 667,101 |  |  | $ | 36.54 |
_______________________________________________________________________________
(1) | Represents an increase or decrease in the number of original PUs awarded based on either the final performance criteria or market condition achievement at the end of the performance period of such PUs or a change in estimated awards based on the forecasted performance against the predefined targets.
Calculation of basic and diluted net income (loss) per share attributable to the entity | The calculation of basic and diluted income (loss) per share for the years ended December 31, 2016, 2017 and 2018 is as follows:
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Income (loss) from continuing operations | $ | 103,880 |  |  | $ | 191,723 |  |  | $ | 376,976 |
Less: Net income (loss) attributable to noncontrolling interests | 2,409 |  |  | 1,611 |  |  | 1,198 |
Income (loss) from continuing operations (utilized in numerator of Earnings Per Share calculation) | $ | 101,471 |  |  | $ | 190,112 |  |  | $ | 375,778 |
Income (loss) from discontinued operations, net of tax | 3,353 |  |  | (6,291 | ) |  | (12,427 | )
Net income (loss) attributable to Iron Mountain Incorporated | $ | 104,824 |  |  | $ | 183,821 |  |  | $ | 363,351 |
Weighted-average shares—basic | 246,178,000 |  |  | 265,898,000 |  |  | 285,913,000 |
Effect of dilutive potential stock options | 574,954 |  |  | 431,071 |  |  | 234,558 |
Effect of dilutive potential RSUs and PUs | 514,044 |  |  | 509,235 |  |  | 505,030 |
Effect of Over-Allotment Option(1) | — |  |  | 6,278 |  |  | — |
Weighted-average shares—diluted | 247,266,998 |  |  | 266,844,584 |  |  | 286,652,588 |
Earnings (losses) per share—basic: |  |  |  |  |  |  |  |
Income (loss) from continuing operations | $ | 0.41 |  |  | $ | 0.71 |  |  | $ | 1.31 |
Income (loss) from discontinued operations, net of tax | 0.01 |  |  | (0.02 | ) |  | (0.04 | )
Net income (loss) attributable to Iron Mountain Incorporated(2) | $ | 0.43 |  |  | $ | 0.69 |  |  | $ | 1.27 |
Earnings (losses) per share—diluted: |  |  |  |  |  |  |  |
Income (loss) from continuing operations | $ | 0.41 |  |  | $ | 0.71 |  |  | $ | 1.31 |
Income (loss) from discontinued operations, net of tax | 0.01 |  |  | (0.02 | ) |  | (0.04 | )
Net income (loss) attributable to Iron Mountain Incorporated(2) | $ | 0.42 |  |  | $ | 0.69 |  |  | $ | 1.27 |
Antidilutive stock options, RSUs and PUs, excluded from the calculation | 1,790,362 |  |  | 2,326,344 |  |  | 3,258,078 |
___________________________________________________________________
(1) | See Note 12.
(2) | Columns may not foot due to rounding.
Roll forward of allowance for doubtful accounts and credit memo reserves | Rollforward of allowance for doubtful accounts and credit memo reserves is as follows:
Year Ended December 31, |  | Balance at Beginning of the Year |  | Credit Memos Charged to Revenue |  | Allowance for Bad Debts Charged to Expense |  | Other(1) |  | Deductions(2) |  | Balance at End of the Year
2016 |  | $ | 31,447 |  |  | $ | 37,616 |  |  | $ | 8,705 |  |  | $ | 16,528 |  |  | $ | (50,006 | ) |  | $ | 44,290 |
2017 |  | 44,290 |  |  | 38,966 |  |  | 14,826 |  |  | 1,905 |  |  | (53,339 | ) |  | 46,648 |
2018 |  | 46,648 |  |  | 36,329 |  |  | 18,625 |  |  | (1,568 | ) |  | (56,450 | ) |  | 43,584 |
_______________________________________________________________________________
(1) | Primarily consists of recoveries of previously written-off accounts receivable, allowances of businesses acquired (primarily Recall in 2016) and the impact associated with currency translation adjustments.
(2) | Primarily consists of the issuance of credit memos and the write-off of accounts receivable.
Assets and liabilities carried at fair value measured on a recurring basis | The assets and liabilities carried at fair value and measured on a recurring basis as of December 31, 2017 and 2018, respectively, are as follows:
|  |  | Fair Value Measurements at December 31, 2017 Using
Description | Total Carrying Value at December 31, 2017 |  | Quoted prices in active markets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
Money Market Funds(1) | $ | 585,000 |  |  | $ | — |  |  | $ | 585,000 |  |  | $ | — |
Time Deposits(1) | 24,482 |  |  | — |  |  | 24,482 |  |  | — |
Trading Securities | 11,784 |  |  | 11,279 |  | (2) | 505 |  | (3) | — |
Derivative Assets(4) | 1,579 |  |  | — |  |  | 1,579 |  |  | — |
Derivative Liabilities(4) | 2,329 |  |  | — |  |  | 2,329 |  |  | — |
|  |  | Fair Value Measurements at December 31, 2018 Using
Description | Total Carrying Value at December 31, 2018 |  | Quoted prices in active markets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
Time Deposits(1) | $ | 956 |  |  | $ | — |  |  | $ | 956 |  |  | $ | — |
Trading Securities | 10,753 |  |  | 10,248 |  | (2) | 505 |  | (3) | — |
Derivative Assets(4) | 93 |  |  | — |  |  | 93 |  |  | — |
Interest Rate Swap Agreements Liabilities(5) | 973 |  |  | — |  |  | 973 |  |  | — |
_____________________________________________________________
(1) | Money market funds and time deposits are measured based on quoted prices for similar assets and/or subsequent transactions.
(2) | Certain trading securities are measured at fair value using quoted market prices.
(3) | Certain trading securities are measured based on inputs other than quoted market prices that are observable.
(4) | Derivative assets and liabilities relate to short-term (six months or less) foreign currency contracts that we have entered into to hedge certain of our foreign exchange intercompany exposures, as more fully disclosed at Note 3. We calculate the value of such forward contracts by adjusting the spot rate utilized at the balance sheet date for translation purposes by an estimate of the forward points observed in active markets.
(5) | We have entered into interest rate swap agreements to hedge certain of our interest rate exposures, as more fully disclosed in Note 3. The interest rate swap agreements are designated as cash flow hedges and are measured based on inputs other than quoted market prices that are observable.
Schedule of changes in accumulated other comprehensive items, net | The changes in accumulated other comprehensive items, net for the years ended December 31, 2016, 2017 and 2018 are as follows:
| Foreign Currency Translation Adjustments |  | Market Value Adjustments for Securities |  | Fair Value Adjustments for Interest Rate Swap Agreements |  | Total
Balance as of December 31, 2015 | $ | (175,651 | ) |  | $ | 734 |  |  | $ | — |  |  | $ | (174,917 | )
Other comprehensive (loss) income: |  |  |  |  |  |  |
Foreign currency translation adjustment | (36,922 | ) |  | — |  |  | — |  |  | (36,922 | )
Market value adjustments for securities | — |  |  | (734 | ) |  | — |  |  | (734 | )
Total other comprehensive (loss) income | (36,922 | ) |  | (734 | ) |  | — |  |  | (37,656 | )
Balance as of December 31, 2016 | $ | (212,573 | ) |  | $ | — |  |  | — |  |  | $ | (212,573 | )
Other comprehensive (loss) income: |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment(1) | 108,584 |  |  | — |  |  | — |  |  | 108,584 |
Total other comprehensive (loss) income | 108,584 |  |  | — |  |  | — |  |  | 108,584 |
Balance as of December 31, 2017 | $ | (103,989 | ) |  | $ | — |  |  | — |  |  | $ | (103,989 | )
Other comprehensive (loss) income: |  |  |  |  |  |  |  |  |  |
Foreign currency translation adjustment | (160,702 | ) |  | — |  |  | — |  |  | (160,702 | )
Fair value adjustments for interest rate swap agreements | — |  |  | — |  |  | (973 | ) |  | (973 | )
Total other comprehensive (loss) income | (160,702 | ) |  | — |  |  | (973 | ) |  | (161,675 | )
Balance as of December 31, 2018 | $ | (264,691 | ) |  | $ | — |  |  | $ | (973 | ) |  | $ | (265,664 | )
______________________________________________________________
(1) | During the year ended December 31, 2017, approximately $29,100 of cumulative translation adjustment associated with our businesses in Russia and Ukraine was reclassified from accumulated other comprehensive items, net and was included in the gain on sale associated with the Russia and Ukraine Divestment (see Note 13).
Other expense (income), net | Other expense (income), net consists of the following:
| Year Ended December 31,
| 2016 |  | 2017 |  | 2018
Foreign currency transaction losses (gains), net(1) | $ | 20,413 |  |  | $ | 43,248 |  |  | $ | (15,567 | )
Debt extinguishment expense, net | 9,283 |  |  | 78,368 |  |  | — |
Other, net(2) | 14,604 |  |  | (42,187 | ) |  | 3,875 |
| $ | 44,300 |  |  | $ | 79,429 |  |  | $ | (11,692 | )
_______________________________________________________________________________
(1) | The gain or loss on foreign currency transactions, calculated as the difference between the historical exchange rate and the exchange rate at the applicable measurement date, includes gains or losses primarily related to (i) our Euro Notes (as defined in Note 4), (ii) borrowings in certain foreign currencies under our Revolving Credit Facility and our Former Revolving Credit Facility (each as defined in Note 4), (iii) certain foreign currency denominated intercompany obligations of our foreign subsidiaries to us and between our foreign subsidiaries, which are not considered permanently invested and (iv) amounts that are paid or received on the net settlement amount from forward contracts (as more fully discussed in Note 3).
(2) | Other, net for the year ended December 31, 2016 includes a charge of $15,417 associated with the loss on disposal of the Australia Divestment Business (as defined in Note 6) and a charge of $1,421 associated with the loss on disposal of the Iron Mountain Canadian Divestments (as defined in Note 6). Other, net for the year ended December 31, 2017 includes a gain of $38,869 associated with the Russia and Ukraine Divestment (as defined in Note 13).

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