v2.4.0.6
Condensed Consolidating Financial Information (Cash Flows) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities    
Net cash provided by operating activities $ 88,118 $ 77,488
Cash flows from investing activities    
Capital expenditures (22,581) (32,796)
Proceeds from sale of Echelon, net 343,750 0
Purchase of Variable Interest Entity Option (187,000) 0
Investment in subsidiaries 0 0
Other investing activities (103) 28
Net cash provided by (used in) investing activities 134,066 (32,768)
Cash flows from financing activities    
Borrowings under bank credit facility 374,000 317,700
Payments under bank credit facility (420,488) (385,025)
Payments on long-term debt   (44)
Proceeds from issuance of non-recourse debt by variable interest entity 0 919
Debt financing costs, net 694 (44)
Payments on notes payable (10,814) 0
Increase (Decrease) in Client Funds Held 0  
Other financing activities (50) (312)
Net cash used in financing activities (56,658) (66,762)
Change in cash and cash equivalents 165,526 (22,042)
Cash and cash equivalents, beginning of period 192,828 178,756
Cash and cash equivalents, end of period 358,354 156,714
Parent
    
Cash flows from operating activities    
Net cash provided by operating activities 39,351 58,559
Cash flows from investing activities    
Capital expenditures (1,028) (7,566)
Proceeds from sale of Echelon, net 343,750  
Purchase of Variable Interest Entity Option (187,000)  
Investment in subsidiaries (3,716) (1,390)
Other investing activities 0 0
Net cash provided by (used in) investing activities 152,006 (8,956)
Cash flows from financing activities    
Borrowings under bank credit facility 202,200 134,800
Payments under bank credit facility (232,025) (184,425)
Payments on long-term debt   (44)
Proceeds from issuance of non-recourse debt by variable interest entity   0
Debt financing costs, net 694  
Payments on notes payable (10,341)  
Increase (Decrease) in Client Funds Held 9,500  
Other financing activities (50) 117
Net cash used in financing activities (30,022) (49,552)
Change in cash and cash equivalents 161,335 51
Cash and cash equivalents, beginning of period 2,520 364
Cash and cash equivalents, end of period 163,855 415
Guarantor Subsidiaries
    
Cash flows from operating activities    
Net cash provided by operating activities 18,438 (2,182)
Cash flows from investing activities    
Capital expenditures (12,494) (7,736)
Proceeds from sale of Echelon, net 0  
Purchase of Variable Interest Entity Option 0  
Investment in subsidiaries 0 0
Other investing activities 0 0
Net cash provided by (used in) investing activities (12,494) (7,736)
Cash flows from financing activities    
Borrowings under bank credit facility 0 0
Payments under bank credit facility 0 0
Payments on long-term debt   0
Proceeds from issuance of non-recourse debt by variable interest entity   0
Debt financing costs, net 0  
Payments on notes payable 0  
Increase (Decrease) in Client Funds Held 0  
Other financing activities 0 (179)
Net cash used in financing activities 0 (179)
Change in cash and cash equivalents 5,944 (10,097)
Cash and cash equivalents, beginning of period 118,714 128,185
Cash and cash equivalents, end of period 124,658 118,088
Non-Guarantor Subsidiaries (100% Owned)
    
Cash flows from operating activities    
Net cash provided by operating activities 23,025 (209)
Cash flows from investing activities    
Capital expenditures (5,904) (28)
Proceeds from sale of Echelon, net 0  
Purchase of Variable Interest Entity Option 0  
Investment in subsidiaries 0 0
Other investing activities (79) 0
Net cash provided by (used in) investing activities (5,983) (28)
Cash flows from financing activities    
Borrowings under bank credit facility 68,200 0
Payments under bank credit facility (78,863) 0
Payments on long-term debt   0
Proceeds from issuance of non-recourse debt by variable interest entity   0
Debt financing costs, net 0  
Payments on notes payable (473)  
Increase (Decrease) in Client Funds Held (9,500)  
Other financing activities 0 0
Net cash used in financing activities (20,636) 0
Change in cash and cash equivalents (3,594) (237)
Cash and cash equivalents, beginning of period 36,902 3,944
Cash and cash equivalents, end of period 33,308 3,707
Non-Guarantor Subsidiaries (Not 100% Owned)
    
Cash flows from operating activities    
Net cash provided by operating activities 11,020 21,320
Cash flows from investing activities    
Capital expenditures (3,155) (17,466)
Proceeds from sale of Echelon, net 0  
Purchase of Variable Interest Entity Option 0  
Investment in subsidiaries 0 1,390
Other investing activities (24) 28
Net cash provided by (used in) investing activities (3,179) (16,048)
Cash flows from financing activities    
Borrowings under bank credit facility 103,600 182,900
Payments under bank credit facility (109,600) (200,600)
Payments on long-term debt   0
Proceeds from issuance of non-recourse debt by variable interest entity   919
Debt financing costs, net 0  
Payments on notes payable 0  
Increase (Decrease) in Client Funds Held 0  
Other financing activities 0 (250)
Net cash used in financing activities (6,000) (17,031)
Change in cash and cash equivalents 1,841 (11,759)
Cash and cash equivalents, beginning of period 34,692 46,263
Cash and cash equivalents, end of period 36,533 34,504
Eliminations
    
Cash flows from operating activities    
Net cash provided by operating activities (3,716) 0
Cash flows from investing activities    
Capital expenditures 0 0
Proceeds from sale of Echelon, net 0  
Purchase of Variable Interest Entity Option 0  
Investment in subsidiaries 3,716 0
Other investing activities 0 0
Net cash provided by (used in) investing activities 3,716 0
Cash flows from financing activities    
Borrowings under bank credit facility 0 0
Payments under bank credit facility 0 0
Payments on long-term debt   0
Proceeds from issuance of non-recourse debt by variable interest entity   0
Debt financing costs, net 0  
Payments on notes payable 0  
Increase (Decrease) in Client Funds Held 0  
Other financing activities 0 0
Net cash used in financing activities 0 0
Change in cash and cash equivalents 0 0
Cash and cash equivalents, beginning of period 0 0
Cash and cash equivalents, end of period $ 0 $ 0