Depreciation and Amortization

9 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Depreciation and Amortization

4. Depreciation and Amortization

Depreciation and amortization expense for property and equipment and intangible assets for the three and nine months ended September 30, 2013 and 2012 was as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Operating expenses	$	4,686	$	4,130	$	13,911	$	12,223
Corporate general and administrative expenses		84		82		233		250
Total depreciation and amortization expense	$	4,770	$	4,212	$	14,144	$	12,473