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Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2022
Accounting Policies [Abstract]  
Schedule of Calculation of Basic and Diluted Earnings Per Share
The calculations of basic and diluted earnings per share for the three and six months ended June 30, 2022 and 2021 are:
 Three Months Ended June 30,Six Months Ended June 30,
 2022202120222021
Net income$111,276 $133,778 $301,584 $263,248 
Shares used to compute basic earnings per common share136,435,000 142,074,000 137,185,000 142,638,000 
Dilutive effect of stock options1,382,000 2,138,000 1,579,000 2,121,000 
Shares used to compute diluted earnings per common share137,817,000 144,212,000 138,764,000 144,759,000 
Basic earnings per common share$0.82 $0.94 $2.20 $1.85 
Diluted earnings per common share$0.81 $0.93 $2.17 $1.82 
Schedule of Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities
The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the six months ended June 30:
20222021
Net income$301,584 $263,248 
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation16,384 16,733 
Amortization33,395 29,075 
Equity in earnings of unconsolidated affiliate(62,272)(68,415)
Distributions received from unconsolidated affiliate69,824 68,064 
Stock-based compensation20,573 19,855 
Provision for losses on receivables350 2,088 
Deferred income tax expense(23,506)(6,869)
Net loss (gain) from investments3,109 (709)
Change in other long-term liabilities1,998 987 
Change in other assets(3,111)(976)
Contract costs capitalized, net of amortization883 429 
Other(1,521)929 
Change in current assets and liabilities
(Increase) decrease in
Receivables from investment products4,125 (906)
Receivables(25,523)(26,437)
Other current assets(7,014)538 
Advances due from unconsolidated affiliate53,500 51,364 
(Decrease) increase in
Accounts payable(7)1,525 
Accrued liabilities(55,734)(25,721)
Deferred revenue3,578 195 
Total adjustments29,031 61,749 
Net cash provided by operating activities$330,615 $324,997