15.

Leases

The majority of the Company’s facilities are leased under non-cancelable operating leases, ranging in terms from five to fifteen years, which contain renewal options of five to ten years at the fair rental value at the time of renewal. The Company’s leases are generally subject to periodic consumer price index increases or contain fixed escalation clauses. The Company also leases certain facilities and equipment under capital leases.

Future minimum lease payments under non-cancelable operating leases and capital leases are as follows:

	Operating leases		Capital leases
2016	$	431,658	$	30,538
2017		415,746		30,848
2018		375,516		31,196
2019		331,575		32,065
2020		283,633		32,443
Thereafter		1,083,825		235,285
	$	2,921,953		392,375
Less portion representing interest				(109,190	)
Total capital lease obligations, including current portion			$	283,185

Rent expense under all operating leases for 2015, 2014, and 2013 was $514,287, $460,093 and $424,096, respectively. Rent expense is recorded on a straight-line basis, over the term of the lease, for leases that contain fixed escalation clauses or include abatement provisions. Leasehold improvement incentives are deferred and amortized to rent expense over the term of the lease. The net book value of property and equipment under capital leases was $261,960 and $197,344 at December 31, 2015 and 2014, respectively. Capital lease obligations are included in long-term debt. See Note 14 to the consolidated financial statements.