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Capital Stock and Share-Based Compensation - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Mar. 30, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
May 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share-based compensation expense recognized     $ 5,493 $ 4,293 $ 4,065  
Unrecognized stock-based compensation expense $ 9,800   9,800      
Unrecognized stock-based compensation expense, weighted-average recognition period 2 years 7 months 9 days          
Deferred Stock Units            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share-based compensation expense recognized     $ 500 $ 500 $ 500  
2010 Incentive Award Plan            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Maximum number of shares to be issued           4,398,613
Incentive plan and award expiration date     Apr. 09, 2024      
Shares available for future issuance 1,301,310   1,301,310      
2010 Incentive Award Plan | Restricted Stock Units (RSUs) | Minimum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Vesting period     3 years      
2010 Incentive Award Plan | Restricted Stock Units (RSUs) | Maximum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Vesting period     5 years      
2010 Incentive Award Plan | Restricted Deferred Stock Units            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Total value of restricted stock and deferred stock units vested     $ 6,000      
2010 Incentive Award Plan | EPS Performance-based Restricted Stock Units            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Vesting period     3 years      
2010 Incentive Award Plan | EPS Performance-based Restricted Stock Units | Minimum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Range of percentage of shares to be issued upon settlement following vesting of target number of shares     0.00%      
2010 Incentive Award Plan | EPS Performance-based Restricted Stock Units | Maximum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Range of percentage of shares to be issued upon settlement following vesting of target number of shares     200.00%      
2010 Incentive Award Plan | TSR Performance-based Restricted Stock Units            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Vesting period     3 years      
2010 Incentive Award Plan | TSR Performance-based Restricted Stock Units | Minimum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Range of percentage of shares to be issued upon settlement following vesting of target number of shares     0.00%      
2010 Incentive Award Plan | TSR Performance-based Restricted Stock Units | Maximum            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Range of percentage of shares to be issued upon settlement following vesting of target number of shares     200.00%      
2010 Incentive Award Plan | Stock Options            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Vesting period     3 years      
Stock options, Granted   193,000 0      
Stock options, Expiration Period   10 years        
Stock options, Exercised     0