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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2016
May 31, 2016
Aug. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Expired unexercised, number of shares           474,443    
Exercisable stock options       0 0 154,803 373,435  
Share-based compensation, number of shares exercised             323,645  
Cumulative unrecorded stock-based compensation charge, reversal           $ 1,827    
Deferred tax asset       $ 1,700   $ 1,700   $ 1,800
Common stock, shares issued       52,521,345   52,521,345   55,271,954
Options exercise price range, lower limit           $ 7.35    
Options exercise price range, upper limit           $ 24.46    
Stock Options [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted, Number of shares       0 0 0 0  
Proceeds from exercise of stock options             $ 3,800  
Share-based compensation, number of shares exercised             323,645  
Number of shares, forfeitures       0 0 0 0  
Unrecognized compensation cost       $ 500   $ 500    
Number of shares, exercised       0 0 0    
Unrecognized compensation cost, expected recognition period, years           1 year    
Restricted Stock [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted, Number of shares 387,000   319,492          
Fair value of restricted stock vested           $ 700 $ 1,400  
Unrecognized compensation cost       $ 4,100   4,100    
Cumulative unrecorded stock-based compensation charge           2,900    
Cumulative unrecorded stock-based compensation charge, reversal           $ 1,800    
Unrecognized compensation cost, expected recognition period, years           2 years    
Restricted Stock [Member] | Executive Officer [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted, Number of shares 350,000              
Restricted Stock [Member] | Non-Employee Directors [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted, Number of shares 37,000   17,955          
Restricted Stock [Member] | Employees [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Granted, Number of shares     301,537          
Restricted Stock [Member] | One-Third Shares Vest 2019 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, to be achieved           $ 2.60    
Restricted Stock [Member] | Two-Thirds Shares Vest 2019 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, to be achieved           2.80    
Restricted Stock [Member] | All Shares Vest 2019 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, to be achieved           3.00    
Restricted Stock [Member] | One-Third Shares Vest 2018 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, to be achieved           2.88    
Restricted Stock [Member] | Two-Thirds Shares Vest 2018 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, to be achieved           3.30    
Restricted Stock [Member] | All Shares Vest 2018 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, to be achieved           $ 3.76    
Restricted Stock [Member] | Not Achieving 2018 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Unrecognized compensation cost       $ 6,000   $ 6,000    
2019 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, linear interpolation           $ 2.80    
2018 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS, linear interpolation           3.30    
Number of common stock shares that will impact fundamental EPS calculation   10,000,000            
Minimum [Member] | 2019 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS           2.60    
Minimum [Member] | 2018 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS           2.88    
Maximum [Member] | 2019 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS           3.00    
Maximum [Member] | 2018 Fundamental EPS [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fundamental EPS           $ 3.76