OTHER BALANCE SHEET DETAILS

As of the dates indicated, other long-term assets are comprised of the following (in thousands):



	October 31,
	2017		2016
Maintenance spares inventory, net	$	46,872	$	49,535
Minority equity investments	6,000		6,000
Deferred debt issuance costs, net ⁽¹⁾	1,041		1,363
Financing receivable	1,052		1,870
Forward starting interest rate swaps	219		—
Other	8,409		8,236
	$	63,593	$	67,004

(1) As described in Note 1 above, in connection with Ciena's adoption of ASU 2015-03 during the first quarter of fiscal 2017, deferred debt issuance costs associated with its convertible notes and term loans were retrospectively reclassified from other long-term assets to current portion of long-term debt and long-term debt, net on the Consolidated Balance Sheets. The remaining deferred debt issuance costs reflected relate to Ciena's ABL Credit Facility (described in Note 17 below). The amortization of deferred debt issuance costs for Ciena's ABL Credit Facility is included in interest expense, and was $0.3 million, $0.4 million and $0.7 million for fiscal 2017, fiscal 2016 and fiscal 2015, respectively.

As of the dates indicated, accrued liabilities and other short-term obligations are comprised of the following (in thousands):



	October 31,
	2017		2016
Compensation, payroll related tax and benefits	$	113,272	$	106,687
Warranty	42,456		52,324
Vacation	39,778		36,112
Capital lease obligations	3,772		2,321
Interest payable	3,612		4,649
Other	120,044		108,260
	$	322,934	$	310,353

The following table summarizes the activity in Ciena’s accrued warranty for the fiscal years indicated (in thousands):



Year ended	Beginning								Ending
October 31,	Balance		Acquired		Current Year Provisions ⁽¹⁾		Settlements		Balance
2015	$	55,997	$	2,996	$	17,881	$	20,220	$	56,654
2016	$	56,654	$	—	$	15,483	$	19,813	$	52,324
2017	$	52,324	$	—	$	7,965	$	17,833	$	42,456

(1) As a result of actual failure rates lower than expected, we adjusted our current year provisions for warranty. These adjustments for previous years provisions had the effect of reducing warranty provisions by $9.7 million, $5.3 million and $6.5 million for fiscal 2017, 2016 and 2015 respectively.

The decreases in the current year warranty provisions and the recording of adjustments on prior year provisions during fiscal 2017, fiscal 2016 and fiscal 2015 were primarily due to lower failure rates than previously estimated, as mentioned above, and reduced costs due to efficiencies.

As of the dates indicated, deferred revenue is comprised of the following (in thousands):



	October 31,
	2017			2016
Products	$	49,135		$	45,216
Services	135,872			137,647
	185,007			182,863
Less current portion	(102,418		)	(109,009		)
Long-term deferred revenue	$	82,589		$	73,854

As of the dates indicated, other long-term obligations are comprised of the following (in thousands):



	October 31,
	2017		2016
Capital lease obligations	73,407		24,298
Income tax liability	15,445		14,122
Deferred tenant allowance	8,162		9,164
Straight-line rent	7,267		6,406
Forward starting interest rate swaps	—		5,967
Construction liability	—		57,602
Other	7,068		6,835
	$	111,349	$	124,394

Ciena capitalizes construction in progress and records a corresponding long-term liability for build-to-suit lease agreements where Ciena is considered the owner during the construction period for accounting purposes. As of May 1, 2017, occupancy of both office buildings was complete. As such, Ciena recorded capital leases for these buildings, which will be depreciated over the lease terms, and removed the build-to-suit construction in progress asset and the corresponding long-term liability. See Note 10 for more details regarding this arrangement.

The following is a schedule by fiscal years of future minimum lease payments under capital leases and the present value of minimum lease payments as of October 31, 2017 (in thousands):



Year Ending October 31,	Amount
2018	$	9,251
2019	8,828
2020	7,846
2021	7,742
2022	8,064
Thereafter	85,405
Net minimum capital lease payments	127,136
Less: Amount representing interest	(49,957		)
Present value of minimum lease payments	77,179
Less: Current portion of present value of minimum lease payments	(3,772		)
Long-term portion of present value of minimum lease payments	$	73,407