Consolidated Balance Sheets Parenthetical (USD $) In Thousands, except Per Share data	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Allowance for doubtful accounts	$ 1,695	$ 3,142
Accumulated depreciation, property and equipment	62,267	57,544
Accumulated amortization, other intangible assets	$ 73,026	$ 63,534
Shareholders' equity:
Common stock, par value	$ 0.00	$ 0.00
Common stock, shares authorized	60,000	60,000
Common stock, shares issued	37,556	37,556
Common stock, shares outstanding	37,556	37,556