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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Direct operating expenses, depreciation and amortization	$ 7,460	$ 4,111
Direct operating expenses, stock-based compensation	682	933
Selling, general and administrative, depreciation and amortization	1,005	1,046
Selling, general and administrative, stock-based compensation	$ 656	$ 1,978

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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