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CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF INCOME
Direct operating expenses depreciation and amortization	$ 20,393	$ 13,201	$ 11,502
Direct operating expenses stock-based compensation	763	6,242	10,586
Selling, general and administrative depreciation and amortization	3,625	4,448	2,234
Selling, general and administrative stock-based compensation	$ 4,016	$ 12,076	$ 23,419

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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