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Condensed Statements of Cash Flows (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Operating Activities:      
Net income/(loss) $ (102,020) $ 24,362 $ 30,369
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:      
Stock-based compensation 22,803 31,268 41,212
Goodwill impairment 120,298    
Net cash provided by/(used in) operating activities 203,204 (28,770) (115,948)
Financing Activities:      
Increase/(decrease) in bank syndicated financing (10,000) 121,703  
Issuance/(repayment) of variable rate senior notes   (120,000) 120,000
Repurchases of common stock (26,529) (57,819) (28,499)
Net cash provided by/(used in) financing activities (160,165) 234,207 113,292
Net increase in cash and cash equivalents 35,205 6,660 (5,906)
Cash and cash equivalents at beginning of period 50,602 43,942 49,848
Cash and cash equivalents at end of period 85,807 50,602 43,942
Supplemental disclosures of cash flow information Cash received/(paid) during the year for:      
Interest 33,261 35,620 10,394
Income taxes 14,982 5,388 (15,233)
Parent Company
     
Operating Activities:      
Net income/(loss) (102,020) 24,362 30,369
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:      
Stock-based compensation 437 300 318
Goodwill impairment 9,247    
Equity distributed in excess of/(in undistributed) income of subsidiaries 167,226 54,267 (33,657)
Net cash provided by/(used in) operating activities 74,890 78,929 (2,970)
Financing Activities:      
Increase/(decrease) in bank syndicated financing (10,000) 125,000  
Issuance/(repayment) of variable rate senior notes   (120,000) 120,000
Advances to subsidiaries (51,916) (29,369) (93,119)
Repurchases of common stock (5,994) (47,610) (23,908)
Net cash provided by/(used in) financing activities (67,910) (71,979) 2,973
Net increase in cash and cash equivalents 6,980 6,950 3
Cash and cash equivalents at beginning of period 7,513 563 560
Cash and cash equivalents at end of period 14,493 7,513 563
Supplemental disclosures of cash flow information Cash received/(paid) during the year for:      
Interest (5,361) (5,257) 4
Income taxes $ 3,128 $ (112,404) $ 2,101