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
2015	$	395,862	$	21,011
2016		370,920		21,277
2017		344,232		21,552
2018		302,752		21,961
2019		262,645		22,615
Thereafter		901,792		202,245
	$	2,578,203		310,661
Less portion representing interest				(92,564	)
Total capital lease obligations, including current portion			$	218,097

Rent expense under all operating leases for 2014, 2013, and 2012 was $460,093, $424,096 and $345,066, 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 $197,344 and $145,615 at December 31, 2014 and 2013, respectively. Capital lease obligations are included in long-term debt. See Note 14 to the consolidated financial statements.