9. Commitments

Leases

The Company leases certain office space and equipment under non-cancelable operating lease agreements, which expire at various dates through 2021. Certain of the leases contain escalation clauses and provide for the pass-through of increases in operating expenses and real estate taxes. Rent related to leases that have escalation clauses is recognized on a straight-line basis. Resulting deferred rent charges are included in other long-term liabilities and were $1.0 million and $1.2 million, at September 30, 2016 and 2015, respectively. Future minimum payments under the leases as of September 30, 2016 are as follows:

Years ending September 30,	Operating Lease Payments
	(in thousands)
2017	$	9,406
2018		8,645
2019		6,607
2020		3,434
2021		1,639
2022		49

Total future minimum lease payments	$	29,780

Rent expense for the years ended September 30, 2016, 2015 and 2014 was $11.5 million, $12.5 million, and $12.1 million, respectively.