v2.4.0.8
Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Cash flows from operating activities:    
Net income $ 15,226 $ 14,512
Adjustments to reconcile net income to net cash provided by operating activities:    
Provision for (benefit of) deferred income taxes (4,481) 1,301
Depreciation and amortization 13,328 10,678
Non-cash interest on convertible notes 753 1,942
Provision for bad debts 601 904
Stock-based compensation 5,346 2,480
Gain (loss) on the disposition of property and equipment 3 (454)
Deferred interest income (1,018)  
Loss on conversion of convertible debt 9,253  
Changes in operating accounts:    
Accounts receivable (26,801) (4,980)
Inventories (9,900) (9,453)
Prepaid expenses and other current assets (258) 20
Accounts payable 253 4,111
Accrued liabilities 6,654 129
Customer deposits 2,055 (280)
Deferred revenue 4,069 718
Other operating assets and liabilities (2,290) (250)
Net cash provided by operating activities 12,793 21,378
Cash flows from investing activities:    
Purchases of property and equipment (3,751) (1,552)
Additions to license and patent costs (1,313) (389)
Proceeds from disposition of property and equipment 1,882  
Cash paid for acquisitions, net of cash assumed (86,199) (147,511)
Other investing activities (1,500)  
Net cash used in investing activities (90,881) (149,452)
Cash flows from financing activities:    
Proceeds from issuance of common stock 272,081 106,912
Proceeds from exercise of stock options and restricted stock, net 435 897
Cash disbursed in lieu of fractional shares related to stock split (177)  
Repayment of capital lease obligations (95) (81)
Restricted cash   1
Net cash provided by financing activities 272,244 107,729
Effect of exchange rate changes on cash (760) (274)
Net increase (decrease) in cash and cash equivalents 193,396 (20,619)
Cash and cash equivalents at the beginning of the period 155,859 179,120
Cash and cash equivalents at the end of the period 349,255 158,501
Supplemental Cash Flow Information:    
Interest payments 979 4,303
Income tax payments 1,601 771
Non-cash items:    
Transfer of equipment from inventory to property and equipment, net 1,946 [1] 1,580 [1]
Transfer of equipment to inventory from property and equipment, net 441 [2] 1,009 [2]
Stock issued for acquisitions of businesses 6,750 6,604
Stock issued for conversions of 5.50% senior convertible notes 4,433  
Notes redeemed for shares of common stock $ 63,420  
[1] Inventory is transferred from inventory to property and equipment at cost when the Company requires additional machines for training or demonstration or for placement into on-demand parts locations.
[2] In general, an asset is transferred from property and equipment, net into inventory at its net book value when the Company has identified a potential sale for a used machine