Annual report pursuant to Section 13 and 15(d)

Stock-based Plans and Stock-based Compensation (Restricted Stock-Narrative) (Details)

v3.7.0.1
Stock-based Plans and Stock-based Compensation (Restricted Stock-Narrative) (Details)
12 Months Ended
Nov. 17, 2016
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Aug. 23, 2016
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Apr. 01, 2016
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Feb. 10, 2015
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Jan. 22, 2015
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Dec. 31, 2016
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Dec. 31, 2015
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Granted 8/23/2016 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of independent directors, restricted stock units granted | item   5          
Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Units issued           340,480 82,501
Restricted Stock Units (RSUs) [Member] | Granted 1/22/2015, Vesting Started 1/31/2015 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of independent directors, restricted stock units granted | item         3    
Units issued         62,501    
Vesting period           12 months  
Restricted Stock Units (RSUs) [Member] | Granted 2/10/2015, Vesting Started 2/10/2015 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of independent directors, restricted stock units granted | item       1      
Units issued       20,000      
Vesting period           6 months  
Restricted Stock Units (RSUs) [Member] | Granted 4/1/2016 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of independent directors, restricted stock units granted | item     5        
Units issued     116,070        
Vesting period           12 months  
Restricted Stock Units (RSUs) [Member] | Granted 8/23/2016 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Units issued   108,335          
Vesting period           12 months  
Restricted Stock Units (RSUs) [Member] | Granted 11/17/2016 [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of independent directors, restricted stock units granted | item 5            
Units issued 116,075            
Vesting period           12 months