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 397,708
Number of Options Exercisable 238,953
Exercise Price $22.20 - $33.90 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding 269,468
Options Outstanding Weighted - Average Remaining Contractual Life (in years) 8 years 1 month 20 days
Options Outstanding Weighted - Average Exercise Price | $ / shares $ 29.40
Number of Options Exercisable 121,780
Options Exercisable Weighted - Average Remaining Contractual Life 6 years 10 months 13 days
Options Exercisable Weighted - Average Exercise Price | $ / shares $ 30.60
Exercise Price $34.80 - $62.70 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding 126,370
Options Outstanding Weighted - Average Remaining Contractual Life (in years) 6 years 2 months 8 days
Options Outstanding Weighted - Average Exercise Price | $ / shares $ 50.70
Number of Options Exercisable 115,303
Options Exercisable Weighted - Average Remaining Contractual Life 5 years 10 months 13 days
Options Exercisable Weighted - Average Exercise Price | $ / shares $ 51.60
Exercise Price $96.00 - $289.20 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Options Outstanding 1,870
Options Outstanding Weighted - Average Remaining Contractual Life (in years) 2 years 710 days
Options Outstanding Weighted - Average Exercise Price | $ / shares $ 238.50
Number of Options Exercisable 1,870
Options Exercisable Weighted - Average Remaining Contractual Life 2 years 710 days
Options Exercisable Weighted - Average Exercise Price | $ / shares $ 238.50