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Share-Based Compensation (Narrative) (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Apr. 30, 2014
employee
Mar. 30, 2011
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Incremental compensation expense from plan modification     $ 741 $ 149 $ 0    
ADBV Long-Term Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expiration period 3 years            
Number of employees affected by plan modification | employee 84            
Units exercisable (in shares) | shares     664,775        
Share-based compensation expense     $ (449) (3,772) 1,875    
Share-based compensation related income tax benefits     99 905 334    
2011 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation expense     2,788 6,163 5,782    
Share-based compensation related income tax benefits     1,581 (678) (88)    
Percentage of total outstanding shares of the entity immediately follow the IPO that is authorized under equity incentive plan   2.50%          
IPO [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Share-based compensation expense     210 $ 2,503 $ 1,964    
Award vesting percentage       33.33% 33.33% 33.33%  
Stock Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation related to expired stock options in Additional paid-in capital     2,077        
Stock Option [Member] | 2011 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Value of stock options and restricted stock granted during period     $ 0 $ 491 $ 1,807    
Weighted-average period of stock options recognized     2 years 4 months 24 days        
Restricted Share Units [Member] | 2011 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Value of stock options and restricted stock granted during period     $ 5,844 2,723 $ 3,056    
Weighted-average period of stock options recognized     4 years        
General and Administrative Expense [Member] | ADBV Long-Term Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Incremental compensation expense from plan modification     $ 511 $ 149      
Accrued Payroll and Other Liabilities [Member] | ADBV Long-Term Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unrecognized compensation costs     $ 248        
Second Anniversary Of Grant Date [Member] | 2011 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting percentage     40.00% 40.00% 40.00% 40.00% 40.00%
Three Years Following The Grant Date [Member] | 2011 Equity Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting percentage     20.00% 20.00% 20.00% 20.00% 20.00%
Requisite service period     3 years