Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Receivables, allowance for doubtful accounts	$ 805	$ 924
Property and Equipment, accumulated depreciation	201,418	182,453
Capitalized Software, accumulated amortization	$ 149,747	$ 117,100
Stockholders' Equity:
Series Preferred stock, par value	$ 0.05	$ 0.05
Series Preferred stock, shares authorized	50	50
Series Preferred stock, shares issued	0	0
Series Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	750,000	750,000
Common stock, shares issued	172,220	176,506
Common stock, shares outstanding	172,220	176,506