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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Cash flows from operating activities:    
Net income $ 84,557 $ 49,776
Reconciling items:    
Depreciation and amortization 9,038 6,174
Amortization of intangible assets 3,833 3,952
Share-based compensation expense 2,038 2,109
Equity in losses of affiliate 872 355
Bad debt expense 1,170 999
Deferred income taxes   (32)
Loss on sale or disposal of fixed assets 401  
Changes in operating assets and liabilities:    
Accounts receivable (11,662) 2,546
Prepaid expenses and other current assets (4,058) 5,066
Other assets 809 (4,109)
Accounts payable and accrued expenses 10,405 71
Other current and non-current liabilities (266) 1,844
Net cash flows provided by operating activities 97,137 68,751
Cash flows from investing activities:    
Additions to premises and equipment (24,199) (11,291)
Acquisition of business, net of cash acquired   (2,515)
Investment in equity affiliate   (15,000)
Change in restricted cash   (177)
Net cash flows used in investing activities (24,199) (28,983)
Cash flows from financing activities:    
Principal payments on capital lease obligations (491) (544)
Proceeds from stock option exercises 2,619 775
Purchase of treasury stock (16,781) (35,471)
Contributions from non-controlling interests 27 31
Distributions to non-controlling interests (6,008) (5,443)
Net cash flows used in financing activities (20,634) (40,652)
Net increase in cash and cash equivalents 52,304 (884)
Cash and cash equivalents at the beginning of the period 32,125 22,134
Cash and cash equivalents at the end of the period 84,429 21,250
Supplemental cash flow information    
Interest paid 39 65
Income taxes paid (refunded), net 2,252 (2,684)
Non-cash investing and financing activities    
Amortization of tax-deductible goodwill 2,524 2,591
Premises and equipment purchased on account $ 5,992