General form of registration statement for all companies including face-amount certificate companies

Stockholders' Equity (Details 3)

v3.5.0.2
Stockholders' Equity (Details 3)
 12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding 298,281
Number of Options Exercisable 179,215
Exercise Price $29.60 - $45.20 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding 202,101
Options Outstanding Weighted - Average Remaining Contractual Life (in years) 8 years 1 month 20 days
Options Outstanding Weighted - Average Exercise Price | $ / shares $ 39.20
Number of Options Exercisable 91,335
Options Exercisable Weighted - Average Remaining Contractual Life 6 years 10 months 13 days
Options Exercisable Weighted - Average Exercise Price | $ / shares $ 40.80
Exercise Price $46.40 - $83.60 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding 94,777
Options Outstanding Weighted - Average Remaining Contractual Life (in years) 6 years 2 months 8 days
Options Outstanding Weighted - Average Exercise Price | $ / shares $ 67.60
Number of Options Exercisable 86,477
Options Exercisable Weighted - Average Remaining Contractual Life 5 years 10 months 13 days
Options Exercisable Weighted - Average Exercise Price | $ / shares $ 68.80
Exercise Price $128.00 - $385.60 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding 1,403
Options Outstanding Weighted - Average Remaining Contractual Life (in years) 2 years 710 days
Options Outstanding Weighted - Average Exercise Price | $ / shares $ 318.00
Number of Options Exercisable 1,403
Options Exercisable Weighted - Average Remaining Contractual Life 2 years 710 days
Options Exercisable Weighted - Average Exercise Price | $ / shares $ 318.00