XML 83 R68.htm IDEA: XBRL DOCUMENT v3.19.1
Stock-Based Compensation - Summary of Nonvested Stock Awards Granted (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
employee
shares
Mar. 31, 2017
employee
shares
Sep. 30, 2016
employee
Jun. 30, 2016
executive_officer
Dec. 31, 2018
$ / shares
shares
Dec. 31, 2017
$ / shares
shares
Dec. 31, 2016
$ / shares
shares
Director group              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Number of Stock Awards Granted (shares)         64,545 51,179  
Weighted Average Grant Date Fair Value (usd per share) | $ / shares         $ 9.45 $ 6.35  
Employee group              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Number of Stock Awards Granted (shares)         488,685 641,751 1,250,750
Vesting Period             2 years
Weighted Average Grant Date Fair Value (usd per share) | $ / shares         $ 9.56 $ 6.31 $ 4.88
Employee inducement              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Number of Stock Awards Granted (shares)         160,516 100,000 100,000
Vesting Period             3 years
Weighted Average Grant Date Fair Value (usd per share) | $ / shares         $ 8.95 $ 6.33 $ 4.94
Performance-based stock awards (restricted stock units), restricted stock units and restricted stock awards              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Number of Stock Awards Granted (shares) 183,751       713,746    
Weighted Average Grant Date Fair Value (usd per share) | $ / shares         $ 9.42 $ 6.32 $ 4.86
Performance-based stock awards (restricted stock units), restricted stock units and restricted stock awards | Employee group              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Number of employees granted share-based compensation awards | executive_officer       5      
Performance-based stock awards (restricted stock units), restricted stock units and restricted stock awards | Employee inducement              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Number of employees granted share-based compensation awards | employee 2   3        
Performance-based stock awards (restricted stock units), restricted stock units and restricted stock awards | Executive officers              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Number of Stock Awards Granted (shares)   458,000          
Number of employees granted share-based compensation awards | employee   12          
Maximum | Director group              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Vesting Period         1 year 1 year  
Maximum | Employee group              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Vesting Period         3 years 3 years  
Maximum | Employee inducement              
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]              
Vesting Period         3 years 3 years