Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data [Abstract]

Summary Of Quarterly Financial Results

	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
	(In thousands, except per share data)
2011:
Net revenues	$	431,567	$	449,033	$	474,758	$	492,162
Operating income	$	84,624	$	80,081	$	80,380	$	83,026
Net income	$	46,377	$	42,765	$	43,614	$	44,555
Income per common share:
Basic	$	0.50	$	0.46	$	0.49	$	0.52
Diluted	$	0.49	$	0.45	$	0.48	$	0.51
2010:
Net revenues	$	410,040	$	418,366	$	418,673	$	422,126
Operating income	$	80,859	$	85,152	$	83,685	$	84,485
Net income	$	43,636	$	46,415	$	45,452	$	46,071
Income per common share:
Basic	$	0.46	$	0.48	$	0.48	$	0.49
Diluted	$	0.45	$	0.47	$	0.47	$	0.48