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Recent Accounting Pronouncements Recent Accounting Pronouncements Table (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Jun. 30, 2016
Sep. 30, 2016
Sep. 30, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Earnings Per Share, Diluted $ 0.74 $ 0.42 $ 0.33 $ 0.70 $ 0.75 $ 1.54 $ 1.42
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest $ 64,513 $ 36,436 $ 29,704 $ 65,389 $ 66,140 $ 130,653 $ 133,221
Income Tax Expense (Benefit) 20,810 11,659 9,505 22,298 21,164 38,212 45,428
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 43,703 $ 24,777 $ 20,199 $ 43,091 $ 44,976 $ 92,441 $ 87,793
Weighted Average Number of Shares Outstanding, Diluted 59,329 59,174 59,770 61,060 59,474 59,772 61,516
Weighted Average Number of Shares Outstanding, Basic 56,869 57,430 57,709 58,911 57,572 57,334 59,271
Weighted Average Number Diluted Shares Outstanding Adjustment 2,460 1,744 2,061 2,149 1,902 2,438 2,245
Comprehensive (loss) income attributable to noncontrolling interests $ (64) $ 105 $ 237 $ 206 $ 342 $ 278 $ 578
Net Income (Loss) Attributable to Parent $ 43,767 $ 24,672 $ 19,962 $ 42,885 $ 44,634 $ 92,163 $ 87,215
Earnings Per Share, Basic $ 0.77 $ 0.43 $ 0.35 $ 0.73 $ 0.78 $ 1.61 $ 1.47
Restatement Adjustment [Member]              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Earnings Per Share, Diluted   $ 0.41 $ 0.39   $ 0.81    
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest   $ 36,436 $ 29,704   $ 66,140    
Income Tax Expense (Benefit)   11,594 5,808   17,402    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest   $ 24,842 $ 23,896   $ 48,738    
Weighted Average Number of Shares Outstanding, Diluted   59,739 60,253   59,998    
Weighted Average Number of Shares Outstanding, Basic   57,430 57,709   57,572    
Weighted Average Number Diluted Shares Outstanding Adjustment   2,309 2,544   2,426    
Comprehensive (loss) income attributable to noncontrolling interests   $ 105 $ 237   $ 342    
Net Income (Loss) Attributable to Parent   $ 24,737 $ 23,659   $ 48,396    
Earnings Per Share, Basic   $ 0.43 $ 0.41   $ 0.84