Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments for leases

Estimated minimum future lease payments (excluding common area maintenance charges) include payments for certain renewal periods at our option because failure to renew results in an economic disincentive due to significant capital expenditure costs (e.g., racking structures), thereby making it reasonably assured that we will renew the lease. Such payments in effect at December 31, are as follows:



Year	Operating Lease Payments		Sublease Income			Capital Leases
2019	$	323,454	$	(7,525	)	$	80,513
2020	293,276		(7,200		)	71,335
2021	267,379		(7,063		)	61,269
2022	246,128		(6,694		)	52,832
2023	221,808		(6,409		)	44,722
Thereafter	1,287,807		(6,279		)	377,750
Total minimum lease payments	$	2,639,852	$	(41,170	)	688,421
Less amounts representing interest						(241,248		)
Present value of capital lease obligations						$	447,173

Contractual obligations related to purchase commitments

In addition, we have certain contractual obligations related to purchase commitments which require minimum payments as follows:



Year	Purchase Commitments(1)
2019	$	232,880
2020	48,436
2021	40,112
2022	20,042
2023	2,196
Thereafter	1,876
	$	345,542

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(1)	Purchase commitments include obligations for future construction costs associated with the expansion of our data center business which represent a substantial portion of the amount of purchase commitments due in 2019.