Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

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
2018	$	321,404	$	(7,482	)	$	74,392
2019	301,262		(6,069		)	64,944
2020	273,062		(4,847		)	53,334
2021	247,159		(4,612		)	47,042
2022	229,072		(4,086		)	35,796
Thereafter	1,231,304		(9,276		)	318,890
Total minimum lease payments	$	2,603,263	$	(36,372	)	594,398
Less amounts representing interest						(158,113		)
Present value of capital lease obligations						$	436,285

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
2018	$	68,317
2019	19,033
2020	11,479
2021	6,943
2022	937
Thereafter	1,188
	$	107,897