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Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The following table presents certain components of our Condensed Consolidated Statements of Operations as of March 31, 2018 as reported and if we had not adopted ASU 2014-09 on January 1, 2018:

	Three Months Ended March 31, 2018 (As Reported)				Three Months Ended March 31, 2018 (If ASU 2014-09 was not adopted)
Revenues	$	1,042,458			$	1,041,264
Operating Income	$	164,559			$	165,319
Income from Continuing Operations	$	45,614			$	46,374
Per Share Income from Continuing Operations - Basic	$	0.16			$	0.16
Per Share Income from Continuing Operations - Diluted	$	0.16			$	0.16

The Contract Fulfillment Assets recorded as a result of the adoption of ASU 2014-09 as of January 1, 2018 and March 31, 2018 are as follows:

				January 1, 2018 (Date of Adoption of ASU 2014-09)													March 31, 2018
Description		Location in Balance Sheet		Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount					Gross Carrying Amount				Accumulated Amortization				Net Carrying Amount
Commissions asset		Other (within Other Assets, Net)		$	42,072			$	(21,173	)		$	20,899				$	44,729			$	(24,781	)		$	19,948
Intake Costs asset		Other (within Other Assets, Net)		31,604				(14,954		)		16,650					34,408				(17,875		)		16,533

Deferred revenue liabilities, associated with billed Intake Costs, recorded as a result of the adoption of ASU 2014-09 as of January 1, 2018 and March 31, 2018 are as follows:

Description		Location in Balance Sheet		January 1, 2018 (Date of Adoption of ASU 2014-09)				March 31, 2018
Deferred revenue - Current		Deferred revenue		$	9,953			$	10,482
Deferred revenue - Long-term		Other Long-term Liabilities		9,453				9,639

Schedule of foreign currency gain/loss

Total (gain) loss on foreign currency transactions for the three months ended March 31, 2017 and 2018 is as follows:

	Three Months Ended March 31,
	2017				2018
Total (gain) loss on foreign currency transactions	$	(4,164	)		$	21,785

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 three months ended March 31, 2018 are 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
Gross Balance as of December 31, 2017	$	2,474,829			$	551,726			$	453,537			$	846,721			$	—			$	60,048			$	4,386,861
Non-deductible goodwill acquired during the year	—				—				—				—				229,539				—				229,539
Fair value and other adjustments(1)	122				—				—				5,886				—				4,704				10,712
Currency effects	(5,593		)		(1,528		)		13,885				7,713				—				621				15,098
Gross Balance as of March 31, 2018	$	2,469,358			$	550,198			$	467,422			$	860,320			$	229,539			$	65,373			$	4,642,210
Accumulated Amortization Balance as of December 31, 2017	$	205,383			$	53,875			$	57,048			$	288			$	—			$	—			$	316,594
Currency effects	(198		)		(50		)		376				10				—				—				138
Accumulated Amortization Balance as of March 31, 2018	$	205,185			$	53,825			$	57,424			$	298			$	—			$	—			$	316,732
Net Balance as of December 31, 2017	$	2,269,446			$	497,851			$	396,489			$	846,433			$	—			$	60,048			$	4,070,267
Net Balance as of March 31, 2018	$	2,264,173			$	496,373			$	409,998			$	860,022			$	229,539			$	65,373			$	4,325,478
Accumulated Goodwill Impairment Balance as of December 31, 2017	$	85,909			$	—			$	46,500			$	—			$	—			$	3,011			$	135,420
Accumulated Goodwill Impairment Balance as of March 31, 2018	$	85,909			$	—			$	46,500			$	—			$	—			$	3,011			$	135,420

_______________________________________________________________________________

(1) Total fair value and other adjustments include $10,712 in net adjustments primarily related to property, plant and equipment, customer relationship intangible assets and deferred income taxes and other liabilities

Components of amortizable intangible assets

The other finite-lived intangible assets as of December 31, 2017 and March 31, 2018 are as follows:

	December 31, 2017												March 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			$	20,974			$	(11,936	)		$	9,038

The components of our finite-lived intangible assets related to customer relationship value, customer inducements and data center lease-based intangible assets and liabilities as of December 31, 2017 and March 31, 2018 are as follows:

	December 31, 2017												March 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			$	1,728,685			$	(427,550	)		$	1,301,135
Customer inducements(1)	140,030				(66,981		)		73,049				57,502				(35,149		)		22,353
Data center lease-based intangible assets(2)	19,314				(643		)		18,671				282,609				(13,609		)		269,000
	$	1,863,449			$	(462,902	)		$	1,400,547			$	2,068,796			$	(476,308	)		$	1,592,488
Liabilities:
Data center below-market leases	$	—			$	—			$	—			$	11,421			$	(349	)		$	11,072

_______________________________________________________________________________

(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 a Contract Fulfillment Cost. Contract Fulfillment Costs are included in Other, a component of Other Assets, Net, in the accompanying Condensed Consolidated Balance Sheet as of March 31, 2018. See Note 2.d. for information regarding Contract Fulfillment Costs included in our Condensed Consolidated Balance Sheet as of March 31, 2018.

(2) Includes Data Center In-Place Leases, Data Center Tenant Relationships and Data Center Above-Market Leases.

Schedule of amortization expenses

		Three Months Ended March 31,
		2017				2018
Amortization expense included in depreciation and amortization associated with:
Customer relationship intangible assets		$	20,133			$	26,337
Customer inducements		2,666				2,469
Data center in-place leases and tenant relationships		—				10,838
Other finite-lived intangible assets		2,316				1,185
Revenue reduction associated with amortization of:
Permanent withdrawal fees		$	3,158			$	2,585
Data center above-market leases and data center below-market leases		—				1,079

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 Condensed Consolidated Statements of Operations is as follows:

	Three Months Ended March 31,
	2017				2018
Cost of sales (excluding depreciation and amortization)	$	28			$	29
Selling, general and administrative expenses	6,521				7,355
Total stock-based compensation	$	6,549			$	7,384

Summary of stock option activity

A summary of our stock options outstanding as of March 31, 2018 by vesting terms is as follows:

	March 31, 2018
	Stock Options Outstanding			% of Stock Options Outstanding
Three-year vesting period (10 year contractual life)	4,111,684			91.8	%
Five-year vesting period (10 year contractual life)	366,855			8.2	%
	4,478,539			100.0	%

A summary of stock option activity for the three months ended March 31, 2018 is as follows:

	Stock Options			Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (Years)		Average Intrinsic Value
Outstanding at December 31, 2017	3,671,740			$	34.41
Granted	839,437			33.72
Exercised	(20,223	)		19.41
Forfeited	(9,673	)		35.12
Expired	(2,742	)		37.71
Outstanding at March 31, 2018	4,478,539			$	34.34			7.58		$	8,201
Options exercisable at March 31, 2018	2,498,039			$	33.73			6.39		$	7,815
Options expected to vest	1,831,809			$	35.12			9.08		$	367

Summary of the weighted average assumptions used for stock option grants

The weighted average assumptions used for grants in the respective periods are as follows:

		Three Months Ended March 31,
Weighted Average Assumptions		2017			2018
Expected volatility		25.8	%		25.4	%
Risk-free interest rate		1.96	%		2.65	%
Expected dividend yield		6	%		7	%
Expected life		5.0 years			5.0 years

Aggregate intrinsic value of stock options exercised

The aggregate intrinsic value of stock options exercised for the three months ended March 31, 2017 and 2018 is as follows:

	Three Months Ended March 31,
	2017				2018
Aggregate intrinsic value of stock options exercised	$	1,912			$	393

Summary of restricted stock and RSU activity

Cash dividends accrued and paid on RSUs for the three months ended March 31, 2017 and 2018 are as follows:

	Three Months Ended March 31,
	2017				2018
Cash dividends accrued on RSUs	$	683			$	721
Cash dividends paid on RSUs	1,855				2,043

The fair value of RSUs vested during the three months ended March 31, 2017 and 2018 is as follows:

	Three Months Ended March 31,
	2017				2018
Fair value of RSUs vested	$	14,026			$	15,330

A summary of RSU activity for the three months ended March 31, 2018 is as follows:

	RSUs			Weighted- Average Grant-Date Fair Value
Non-vested at December 31, 2017	1,071,469			$	35.38
Granted	611,030			33.58
Vested	(436,489	)		35.12
Forfeited	(24,035	)		36.43
Non-vested at March 31, 2018	1,221,975			$	34.55

Schedule of performance units

Cash dividends accrued and paid on PUs for the three months ended March 31, 2017 and 2018 are as follows:

	Three Months Ended March 31,
	2017				2018
Cash dividends accrued on PUs	$	324			$	450
Cash dividends paid on PUs	205				644

The fair value of earned PUs that vested during the three months ended March 31, 2017 and 2018 is as follows:

	Three Months Ended March 31,
	2017				2018
Fair value of earned PUs that vested	$	905			$	3,033

Summary of Performance Unit (PU) activity

A summary of PU activity for the three months ended March 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	347,576			—			347,576			33.64
Vested	(79,121	)		—			(79,121	)		38.34
Forfeited/Performance or Market Conditions Not Achieved	(2,626	)		(49,881	)		(52,507	)		38.28
Non-vested at March 31, 2018	983,707			(299,948	)		683,759			$	36.60

_______________________________________________________________________________

(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 three months ended March 31, 2017 and 2018 is as follows:

	Three Months Ended March 31,
	2017				2018
Income (loss) from continuing operations	$	58,844			$	45,614
Less: Net income (loss) attributable to noncontrolling interests	382				468
Income (loss) from continuing operations (utilized in numerator of Earnings Per Share calculation)	$	58,462			$	45,146
(Loss) income from discontinued operations, net of tax	$	(337	)		$	(462	)
Net income (loss) attributable to Iron Mountain Incorporated	$	58,125			$	44,684
Weighted-average shares—basic	263,855,000				285,259,000
Effect of dilutive potential stock options	461,761				249,564
Effect of dilutive potential RSUs and PUs	492,905				484,314
Weighted-average shares—diluted	264,809,666				285,992,878
Earnings (losses) per share—basic:
Income (loss) from continuing operations	$	0.22			$	0.16
Income (loss) from discontinued operations, net of tax	—				—
Net income (loss) attributable to Iron Mountain Incorporated(1)	$	0.22			$	0.16
Earnings (losses) per share—diluted:
Income (loss) from continuing operations	$	0.22			$	0.16
Income (loss) from discontinued operations, net of tax	—				—
Net income (loss) attributable to Iron Mountain Incorporated(1)	$	0.22			$	0.16
Antidilutive stock options, RSUs and PUs, excluded from the calculation	2,494,255				3,242,141

_______________________________________________________________________________

(1) Columns may not foot due to rounding.

Assets and liabilities carried at fair value measured on a recurring basis

The assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2017 and March 31, 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 March 31, 2018 Using
Description		Total Carrying Value at March 31, 2018				Quoted prices in active markets (Level 1)						Significant other observable inputs (Level 2)						Significant unobservable inputs (Level 3)
Time Deposits(1)		$	16,678			$	—					$	16,678					$	—
Trading Securities		11,129				10,739				(2)		390				(3)		—
Derivative Liabilities(4)		1,102				—						1,102						—
Interest Rate Swap Agreements(5)		185				—						185						—

_______________________________________________________________________________

(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 three months ended March 31, 2017 and 2018, respectively, are as follows:

	Foreign Currency Translation Adjustments				Total
Balance as of December 31, 2016	$	(212,573	)		$	(212,573	)
Other comprehensive income (loss):
Foreign currency translation adjustments	51,334				51,334
Total other comprehensive income (loss)	51,334				51,334
Balance as of March 31, 2017	$	(161,239	)		$	(161,239	)

	Foreign Currency Translation Adjustments				Fair Value Adjustments for Interest Rate Swap Agreements				Total
Balance as of December 31, 2017	$	(103,989	)		$	—			$	(103,989	)
Other comprehensive income (loss):
Foreign currency translation adjustments	30,092				—				30,092
Fair value adjustments for interest rate swap agreements	—				(185		)		(185		)
Total other comprehensive income (loss)	30,092				(185		)		29,907
Balance as of March 31, 2018	$	(73,897	)		$	(185	)		$	(74,082	)

Other expense (income), net

Other (income) expense, net for the three months ended March 31, 2017 and 2018 consists of the following:

	Three Months Ended March 31,
	2017				2018
Foreign currency transaction (gains) losses, net	$	(4,164	)		$	21,785
Other, net	(2,200		)		(1,634		)
	$	(6,364	)		$	20,151

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