CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows from Operating Activities:
Net income (loss)	$ 139,629	$ 49,908
(Income) Loss from discontinued operations	2,363	(1,587)
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation	201,907	168,920
Amortization (includes amortization of deferred financing costs and discount of $5,652 and $7,875 for the six months ended June 30, 2016 and 2017, respectively)	58,774	38,958
Revenue reduction associated with amortization of permanent withdrawal fees	5,906	6,100
Stock-based compensation expense	15,092	15,913
(Benefit) Provision for deferred income taxes	(9,536)	(9,902)
Gains (Losses) on Extinguishment of Debt Non Cash	0	(9,283)
(Gain) Loss on disposal/write-down of property, plant and equipment, net (including real estate)	(2,238)	(1,077)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	(38,869)	0
Foreign currency transactions and other, net	23,508	5,378
Changes in Assets and Liabilities (exclusive of acquisitions):
Accounts receivable	(27,324)	1,746
Prepaid expenses and other	(23,755)	(41,020)
Accounts payable	(5,960)	(39,377)
Accrued expenses and deferred revenue	9,545	8,508
Other assets and long-term liabilities	(27,002)	(6,146)
Cash Flows from Operating Activities - Continuing Operations	322,040	205,605
Cash Flows from Operating Activities - Discontinued Operations	(2,363)	1,145
Cash Flows from Operating Activities	319,677	206,750
Cash Flows from Investing Activities:
Capital expenditures	(165,207)	(163,665)
Cash paid for acquisitions, net of cash acquired	(38,223)	(276,553)
Acquisition of customer relationships	(21,037)	(10,324)
Customer inducements	(7,473)	(6,422)
Net proceeds from Iron Mountain Divestments (see Note 10)	2,423	53,950
Proceeds from sales of property and equipment and other, net (including real estate)	8,547	371
Cash Flows from Investing Activities—Continuing Operations	(220,970)	(402,643)
Cash Flows from Investing Activities—Discontinued Operations	0	90
Cash Flows from Investing Activities	(220,970)	(402,553)
Cash Flows from Financing Activities:
Repayment of revolving credit, term loan and bridge facilities and other debt	(5,751,416)	(7,387,114)
Proceeds from revolving credit, term loan and bridge facilities and other debt	5,494,125	7,186,805
Net proceeds from sales of senior notes	332,683	738,750
Debt financing and equity contribution from noncontrolling interests	13,230	1,299
Debt repayment and equity distribution to noncontrolling interests	(3,079)	(843)
Parent cash dividends	(147,393)	(232,596)
Net proceeds (payments) associated with employee stock-based awards	810	18,641
Excess tax benefits (deficiency) from stock-based compensation	0	29
Payment of debt financing and stock issuance costs	(544)	(12,032)
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	(61,584)	312,939
Net Cash Provided by (Used in) Financing Activities	(61,584)	312,939
Cash Flows from Financing Activities—Discontinued Operations	0	0
Effect of Exchange Rates on Cash and Cash Equivalents	17,412	(8,528)
Increase (Decrease) in cash and cash equivalents	54,535	108,608
Cash and cash equivalents, beginning of period	236,484	128,381
Cash and cash equivalents, end of period	291,019	236,989
Supplemental Information:
Cash Paid for Interest	177,303	136,351
Cash Paid for Income Taxes, Net	55,922	28,133
Non-Cash Investing and Financing Activities:
Capital Leases	57,383	34,383
Accrued Capital Expenditures	79,775	40,801
Dividends Payable	149,961	4,493
Stock Issued During Period, Value, Acquisitions	0	1,835,026
Equity method investment, fair value	$ 18,000	$ 0