Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Operations [Abstract]
Operating revenues	$ 212,788	$ 216,745	$ 626,141	$ 624,533
Operating expenses
Labor	88,214	88,038	268,497	258,573
Production and distribution	81,295	81,019	240,087	232,519
Advertising, selling, general and administrative	17,439	16,854	50,120	49,941
Depreciation and software amortization	4,957	5,578	15,270	16,823
Intangible asset amortization	168	201	587	733
Total operating expenses	192,073	191,690	574,561	558,589
Operating income	20,715	25,055	51,580	65,944
Other expenses (income)
Interest expense	889	705	2,151	2,102
Interest income	(52)	(69)	(188)	(136)
Other, net	(540)	1,865	575	1,506
Total nonoperating expenses (income)	297	2,501	2,538	3,472
Income before income taxes	20,418	22,554	49,042	62,472
Income tax expense	8,290	8,739	19,572	24,472
Net income	$ 12,128	$ 13,815	$ 29,470	$ 38,000
Basic earnings per common share	$ 0.19	$ 0.22	$ 0.47	$ 0.60
Weighted-average common shares outstanding	62,798	63,622	63,291	63,612
Diluted earnings per common share	$ 0.19	$ 0.22	$ 0.46	$ 0.59
Weighted-average common and common equivalent shares outstanding	63,059	64,076	63,669	64,119