Changes In Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2012

Stockholders' Equity Note [Abstract]

Schedule Of Changes In Common Stock, Additional Paid-In Capital And Accumulated Other Comprehensive Income/(Loss) Accounts

	Common Stock
	Shares		Amount		Additional Paid-In Capital			Accumulated Other Comprehensive Income
Balance, December 31, 2011	39,678		$	397	$	389,166		$	13
Unrealized income on available for sale securities, net of tax	—		—		—			24
Exercise of stock options	224		2		5,434			—
Net excess tax benefit from share-based compensation	—		—		4,403			—
Issuance of common stock under the Employee Stock    Purchase Program	—		—		172			—
Forfeitures of restricted stock	(10	)	—		—			—
Issuances of restricted stock	98		1		(1		)	—
Compensatory arrangements (a)	—		—		4,709			—
Balance, June 30, 2012	39,990		$	400	$	403,883		$	37

(a) Share-based compensation expense includes equity-settled awards only.