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Stock-Based Compensation - Additional Disclosures (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Aug. 18, 2010
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   $ 611 $ 985   $ 3,471 $ 3,884 $ 2,322
Award expiration period   10 years     10 years    
Unearned stock-based compensation expense not yet recognized   $ 5,700          
Unearned stock-based compensation expense not yet recognized, recognition period   2 years 4 months 15 days     1 year 10 months 15 days    
Minimum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period   1 year     1 year    
Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period   3 years     3 years    
2014 Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares that may be issued under plan   1,644,875     1,644,875    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   18,599     15,497    
2016 Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares that may be issued under plan   800,000     800,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   506,777          
Equity Based Incentive Units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award value on date of grant $ 1,900            
Award vesting period 4 years            
Stock-based compensation expense       $ 317 $ 0 $ 0 $ 317
Employee Stock Options and Restricted Stock Units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Unearned stock-based compensation expense not yet recognized         $ 3,300