Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Long-Term Investments Measured At Fair Value Using Significant Unobservable Inputs (Level 3 Inputs)


(in thousands)	2011			2010

Balance as of January 1	$	35,297		$	45,686
Net unrealized gains included in other comprehensive income		526			536
Sales of investments at par value		(11,150	)		(10,925	)

Balance as of December 31	$	24,673		$	35,297


Unrealized losses still held	$	3,327		$	3,853

Schedule Of Calculation Of Basic And Diluted Earnings Per Share


	Year ended December 31,
(in thousands, except per share data)	2011		2010		2009

Net income	$	51,959	$	79,758	$	53,381


Denominator for basic earnings per share – weighted-
average number of common shares outstanding
during the period		59,284		62,141		64,758
Incremental common shares attributable to exercise
of outstanding dilutive options		270		455		303
Incremental common shares attributable to outstanding
restricted shares, restricted stock units and phantom stock		219		96		45
Incremental common shares attributable
to exercise of warrants		—		—		10

Denominator for diluted earnings per share		59,773		62,692		65,116


Basic earnings per share	$	0.88	$	1.28	$	0.82

Diluted earnings per share	$	0.87	$	1.27	$	0.82

Summary Of Weighted-Average Assumptions Used To Value Option Grants


	Year ended December 31,
	2011			2010			2009

Stock Options
Expected term of options	6.2 years			7.0 years			5.7 years
Expected volatility		41	%		40	%		41	%
Risk-free interest rate		2.674	%		2.94	%		2.51	%
Dividend yield	zero			zero			zero

- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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