CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 925,699	$ 236,484
Restricted cash	22,167	0
Accounts receivable (less allowances of $44,290 and $46,648 as of December 31, 2016 and 2017, respectively)	835,742	691,249
Prepaid expenses and other	188,874	184,374
Total Current Assets	1,950,315	1,112,107
Property, Plant and Equipment:
Property, plant and equipment	6,251,100	5,535,783
Less—Accumulated depreciation	(2,833,421)	(2,452,457)
Property, Plant and Equipment, net	3,417,679	3,083,326
Other Assets, net:
Goodwill	4,070,267	3,905,021
Customer relationships and customer inducements	1,400,547	1,252,523
Other	133,594	133,823
Total Other Assets, net	5,604,408	5,291,367
Total Assets	10,972,402	9,486,800
Current Liabilities:
Current portion of long-term debt	146,300	172,975
Accounts payable	289,137	222,197
Accrued expenses	653,146	450,257
Deferred revenue	241,590	201,128
Total Current Liabilities	1,330,173	1,046,557
Long-term Debt, net of current portion	6,896,971	6,078,206
Other Long-term Liabilities	73,039	99,540
Deferred Rent	126,231	119,834
Deferred Income Taxes	155,728	151,295
Commitments and Contingencies
Redeemable Noncontrolling Interests	91,418	54,697
Iron Mountain Incorporated Stockholders' Equity:
Preferred stock (par value $0.01; authorized 10,000,000 shares; none issued and outstanding)	0	0
Common stock (par value $0.01; authorized 400,000,000 shares; issued and outstanding 263,682,670 shares and 283,110,183 shares as of December 31, 2016 and 2017, respectively)	2,831	2,636
Additional paid-in capital	4,164,562	3,489,795
(Distributions in excess of earnings) Earnings in excess of distributions	(1,765,966)	(1,343,311)
Accumulated other comprehensive items, net	(103,989)	(212,573)
Total Iron Mountain Incorporated Stockholders' Equity	2,297,438	1,936,547
Noncontrolling Interests	1,404	124
Total Equity	2,298,842	1,936,671
Total Liabilities and Equity	$ 10,972,402	$ 9,486,800