Summary Of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2012

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Financial Instruments Where Carrying Value And Fair Value Differ

			Fair Value at Reporting Date Using
Financial Instrument	As of March  31, 2012		Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Long-term obligations, excluding capital leases		$136.9		$—		$142.0		$—

Schedule Of Weighted-Average Shares Outstanding

	For the Three-Month Periods Ended March 31,
	2012		2011
Weighted average number of shares outstanding - basic		29,389		28,366
Effect of dilutive securities:
Stock options		16		91
Non-vested stock and stock units		375		410
Weighted average number of shares outstanding - diluted		29,780		28,867
Anti-dilutive securities		340		—