Balance Sheet Parenthetical (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Allowance for doubtful accounts receivable $ 19,503 $ 20,546
Accumulated depreciation of property and equipment 233,414 239,607
Accumulated amortization of intangible assets 114,790 113,153
Accumulated amortization of other assets $ 31,837 $ 30,276
Preferred Stock, par value per share $ 0.02 $ 0.02
Preferred Stock, shares authorized 10,000,000 10,000,000
Preferred Stock, shares issued 0 0
Common Stock, par value per share $ 0.02 $ 0.02
Common Stock, shares authorized 90,000,000 90,000,000
Common Stock, shares issued 56,804,302 56,464,187
Treasury Stock, shares 4,950,682 4,867,420