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Equity Based Compensation (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 3,651,152   5,015,047   5,070,939   5,698,788
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 20,500            
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 9 months 29 days            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ 8,700   $ 900   $ 6,100    
Unvested Share Awards, Employment Inducement [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 22,913            
Performance Shares [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 41,645   50,099   66,822    
Aggregate fair value of share awards granted   $ 1,500   $ 1,500   $ 2,000  
2010 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 7,500,000            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 23,965            
2014 Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 4,000,000            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 3,958,355            
Deferred Compensation Plan, First 1% Of Eligible Compensation [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage 100.00%            
Deferred Compensation Plan, 2% To 6% Of Eligible Compensation [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage 70.00%            
Deferred Compensation Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Percent of elective deferrals which vest immediately (in Percent) 100.00%            
Percent of matching contributions which vest upon the earlier of a defined change in control or the participant's death, disability, attainment of normal retirement age, or the completion of two years of service (in Percent) 100.00%            
Vesting period of employer contributions (in Duration) 2 years            
Deferred Compensation Arrangement with Individual, Compensation Expense $ 751   $ 543   $ 373    
401(k) Plan, First 1% Of Eligible Compensation [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage     100.00%        
401(k) Plan, 2% To 6% Of Eligible Compensation [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage     70.00%        
401(k) Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period of employer contributions (in Duration)     2 years        
Deferred Compensation Arrangement with Individual, Employer Contribution 4,900   $ 4,500   $ 4,100    
Other Liabilities | Deferred Compensation Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Deferred Compensation Liability, Current and Noncurrent $ 12,000   $ 6,000