Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2011

Shareholders' Equity [Abstract]

Summary of changes in shareholders' equity

	Common Stock		Additional Paid-In Capital			Retained Earnings		Treasury Stock			Deferred Comp. Trust			Deferred Comp. Liability			Total
Balance, December 31, 2010	$	206	$	951,234		$	4,029,072	$	(3,240,138	)	$	(27,582	)	$	27,582		$	1,740,374
Net income		—		—			97,028		—			—			—			97,028
Deferred compensation activity		—		—			—		—			2,000			(2,000	)		—
Purchase of common stock for treasury		—		—			—		(666,628	)		—			—			(666,628	)
Equity-based compensation		—		47,966			—		—			—			—			47,966
Tax benefit from stock options exercised and deferred compensation distributions		—		21,272			—		—			—			—			21,272
Proceeds from stock options exercised		—		106,007			—		—			—			—			106,007
Treasury stock issued upon option exercise		—		(72,245	)		—		72,245			—			—			—
Balance, September 30, 2011	$	206	$	1,054,234		$	4,126,100	$	(3,834,521	)	$	(25,582	)	$	25,582		$	1,346,019