v2.4.0.8
Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:          
Net income $ 233,759 $ 199,037 $ 261,225 $ 210,264 $ 169,071
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation and amortization 61,868 51,574 70,165 54,505 41,428
Stock-based compensation expense 16,292 11,976 15,634 13,107 9,974
Deferred income taxes     4,222 9,302 8,963
Excess tax benefit from stock-based payments (15,998) (11,071) (15,737) (7,973) (15,000)
Other 7,424 3,961 4,515 6,556 (47)
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures:          
Receivables (35,287) (12,394) (12,813) (18,074) (12,309)
Inventory (18,207) (47,669) (95,042) (90,091) (67,795)
Prepaid expenses and other assets     (18,952) (5,094) (5,240)
Prepaid income taxes/income taxes payable 40,551 2,688 (774) 2,251 7,492
Accounts payable 1,641 (7,892) (15,097) 28,589 10,156
Accrued expenses and other current liabilities     2,208 (3,303) 8,056
Other noncurrent liabilities     (6,636) (11,733) (4,434)
Other operating assets and liabilities (48,886) 8,138      
Net cash provided by operating activities 340,929 182,072 206,190 211,772 159,183
CASH FLOWS FROM INVESTING ACTIVITIES:          
Purchases of property and equipment (61,126) (60,636) (88,255) (86,416) (61,438)
Proceeds from sales of property and equipment 1,459 692 1,057 1,743 1,441
Investment in unconsolidated subsidiary (9,136) 0      
Proceeds from sale of businesses, net of cash sold     0 0 11,992
Acquisitions, net of cash acquired (395,974) (133,123) (265,336) (486,934) (143,578)
Net cash used in investing activities (464,777) (193,067) (352,534) (571,607) (191,583)
CASH FLOWS FROM FINANCING ACTIVITIES:          
Proceeds from exercise of stock options 13,647 14,187 17,693 11,919 13,962
Excess tax benefit from stock-based payments 15,998 11,071 15,737 7,973 15,000
Debt issuance costs (16,912) (175) (253) (11,048) (419)
Proceeds from issuance of senior notes 600,000 0      
Borrowings under revolving credit facility 399,758 500,087 742,381 1,111,369 0
Repayments under revolving credit facility (745,313) (747,851) (855,402) (453,867) 0
Borrowings under term loans 35,000 200,000 200,000 250,000 0
Repayments under term loans (11,250) (14,375) (20,000) (600,464) (7,476)
Borrowings under receivables securitization facility 41,500 77,272 82,700 0 0
Repayments under receivables securitization facility (111,500) 0 (2,700) 0 0
Repayments of other long-term debt (19,518) (8,336)      
Payments of other obligations (32,091) (600) (23,084) (4,471) (2,105)
Net cash provided by financing activities 169,319 31,280 157,072 311,411 18,962
Effect of exchange rate changes on cash and equivalents 2,096 682 795 982 221
Net increase (decrease) in cash and equivalents 47,567 20,967 11,523 (47,442) (13,217)
Cash and equivalents, beginning of period 59,770 48,247 48,247 95,689 108,906
Cash and equivalents, end of period 107,337 69,214 59,770 48,247 95,689
Supplemental disclosure of cash paid for:          
Income taxes, net of refunds 82,536 110,911 146,478 113,433 88,294
Interest 22,853 20,823 29,026 21,354 27,421
Supplemental disclosure of noncash investing and financing activities:          
Notes payable and long-term obligations, including notes issued in connection with business acquisitions 10,728 8,272 17,637 42,865 11,889
Contingent consideration liabilities 3,854 5,540 5,456 81,239 2,000
Stock issued in connection with business acquisitions     0 0 14,945
Debt assumed with business acquisitions     3,989 13,564 0
Property and equipment acquired under capital leases     14,467 414 0
Non-cash property and equipment additions $ 2,657 $ 9,487 $ 6,564 $ 3,567 $ 1,425