Property and equipment

12 Months Ended

Dec. 31, 2014

Property Plant And Equipment [Abstract]

6.	Property and equipment

Property and equipment were comprised of the following:

	December 31,
	2014			2013
Land	$	35,885		$	34,960
Buildings		157,550			157,998
Leasehold improvements		2,002,735			1,762,470
Equipment and information systems		2,066,775			1,839,981
New center and capital asset projects in progress		235,660			172,261
		4,498,605			3,967,670
Less accumulated depreciation		(2,029,506	)		(1,778,259	)
	$	2,469,099		$	2,189,411

Depreciation expense on property and equipment was $428,309, $373,107 and $299,810 for 2014, 2013 and 2012, respectively.

Interest on debt incurred during the development of new centers and other capital asset projects is capitalized as a component of the asset cost based on the respective in-process capital asset balances. Interest capitalized was $7,888, $6,408 and $8,126 for 2014, 2013 and 2012, respectively.

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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