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Share-Based Compensation (Summary of Plan Activity) (Details) - $ / shares
 6 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Stock Option [Member] | 2011 Equity Incentive Plan [Member]        
Restricted Stock Unit Activity [Roll Forward]        
Number of units outstanding, beginning balance (in shares)   2,025,894 2,550,835 2,433,888
Granted, (in shares)       247,475
Forfeited, (in shares)   (80,734) (141,130) (130,528)
Expired (in shares)   (51,305) (383,811)  
Modification (in shares)   (1,117,380)    
Number of units outstanding, ending balance (in shares) 776,475 776,475 2,025,894 2,550,835
Number of units exercisable, ending balance (in shares) 584,103 584,103    
Weighted-average strike price        
Outstanding, Weighted-average base value, beginning balance (in dollars per share)   $ 21.03 $ 17.62 $ 18.57
Granted, Weighted-average base value (in dollars per share)       8.58
Forfeitures, Weighted-average fair value, (in dollars per share)   10.30 16.54 18.14
Expired, Weighted-average fair value (in dollars per share)   14.05 20.01  
Modification, Weighted-average strike price (in dollars per share)   19.07    
Outstanding, Weighted-average base value, ending balance (in dollars per share) $ 15.55 15.55 21.03 17.62
Exercisable, Weighted-average base value (in dollars per share) 16.99 16.99    
Weighted-average grant-date fair value        
Outstanding at beginning of period, Weighted-average grant date fair value, (in dollars per share)   5.87 4.94 5.26
Annual grant, Weighted-average grant date fair value, (in dollars per share)       1.98
Forfeitures, Weighted-average fair value (in dollars per share)   2.68 5.02 5.27
Expired, Weighted-average grant date fair value, (in dollars per share)   4.02 5.41  
Modification, Weighted-average grant date fair value (in dollars per share)   5.30    
Outstanding at end of period, Weighted-average grant date fair value, (in dollars per share) 4.46 4.46 $ 5.87 $ 4.94
Exercisable, Weighted-average grant date fair value, (in dollars per share) $ 4.88 $ 4.88    
Stock Option [Member] | 2011 Equity Incentive Plan Award Modification [Member]        
Restricted Stock Unit Activity [Roll Forward]        
Number of units outstanding, beginning balance (in shares) 1,117,380      
Forfeited, (in shares) (10,020)      
Expired (in shares) (173,961)      
Number of units outstanding, ending balance (in shares) 933,399 933,399    
Number of units exercisable, ending balance (in shares) 842,986 842,986    
Weighted-average strike price        
Outstanding, Weighted-average base value, beginning balance (in dollars per share) $ 19.07      
Forfeitures, Weighted-average fair value, (in dollars per share) 14.33      
Expired, Weighted-average fair value (in dollars per share) 20.14      
Outstanding, Weighted-average base value, ending balance (in dollars per share) 18.92 $ 18.92    
Exercisable, Weighted-average base value (in dollars per share) 19.41 19.41    
Weighted-average grant-date fair value        
Outstanding at beginning of period, Weighted-average grant date fair value, (in dollars per share) 0.01      
Outstanding at end of period, Weighted-average grant date fair value, (in dollars per share) 0.01 0.01    
Exercisable, Weighted-average grant date fair value, (in dollars per share) $ 0.01 $ 0.01    
Restricted Share Units [Member] | 2011 Equity Incentive Plan [Member]        
Restricted Stock Unit Activity [Roll Forward]        
Number of units outstanding, beginning balance (in shares)   1,230,210 862,855 942,068
Granted, (in shares)   865,291 923,213 317,351
Vested, (in shares)   (27,075) (222,781) (274,314)
Forfeited, (in shares)   (142,176) (233,005) (47,947)
Number of units outstanding, ending balance (in shares) 1,780,997 1,780,997 1,230,210 862,855
Number of units exercisable, ending balance (in shares) 0 0    
Weighted-average strike price        
Outstanding, Weighted-average base value, beginning balance (in dollars per share)   $ 7.96 $ 14.38 $ 18.36
Granted, Weighted-average base value (in dollars per share)   4.70 6.33 8.58
Vested, Weighted-average fair value (in dollars per share)   21.20 21.20 21.20
Forfeitures, Weighted-average fair value, (in dollars per share)   6.64 9.88 15.11
Outstanding, Weighted-average base value, ending balance (in dollars per share) $ 6.07 6.07 $ 7.96 $ 14.38
Exercisable, Weighted-average base value (in dollars per share) $ 0.00 $ 0.00    
Restricted Share Units [Member] | 2012 Equity Incentive Plan [Member]        
Restricted Stock Unit Activity [Roll Forward]        
Vested, (in shares)   (24,653) (31,772) (74,303)
Weighted-average strike price        
Vested, Weighted-average fair value (in dollars per share)   $ 14.35 $ 14.35 $ 14.35
Restricted Share Units [Member] | 2013 Equity Incentive Plan [Member]        
Restricted Stock Unit Activity [Roll Forward]        
Vested, (in shares)   (26,054) (68,300)  
Weighted-average strike price        
Vested, Weighted-average fair value (in dollars per share)   $ 14.31 $ 14.31  
Restricted Share Units [Member] | 2014 Equity Incentive Plan [Member]        
Restricted Stock Unit Activity [Roll Forward]        
Vested, (in shares)   (94,546)    
Weighted-average strike price        
Vested, Weighted-average fair value (in dollars per share)   $ 8.58