Summary Of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2011

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Financial Instruments Where Carrying Value And Fair Value Differ

	As of September 30, 2011		Fair Value at Reporting Date Using
Financial Instrument			Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Long-term obligations		$153.2		$—		$158.1		$—

Schedule Of Weighted-Average Shares Outstanding

	For the Three-Month Periods Ended September 30,				For the Nine-Month Periods Ended September 30,
	2011		2010		2011		2010
Weighted average number of shares outstanding—basic		28,770		28,096		28,587		28,007
Effect of dilutive securities:
Stock options		—		79		—		143
Non-vested stock and stock units		—		324		—		340
Weighted average number of shares outstanding—diluted		28,770		28,499		28,587		28,490
Anti-dilutive securities		925		162		544		70