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

Stock Plans (Details 2)

v2.4.0.8
Stock Plans (Details 2) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Goods and Nonemployee Services Transaction [Line Items]              
Weighted-average risk-free interest rate 1.70% 1.00% 2.00% 0.80% 0.92% 0.91% 2.30%
Expected dividend payments $ 0 $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Expected holding period (years) 4 years 2 months 12 days [1] 3 years 10 months 24 days [1] 6 years 6 months [1] 4 years 2 months 12 days [1] 3 years 10 months 24 days [2] 5 years 1 month 6 days [2] 5 years 4 months 24 days [2]
Weighted-average volatility factor 1.67 [3] 1.56 [3] 1.66 [3] 1.70 [3] 1.38 [3] 1.75 [3] 1.71 [3]
Estimated forfeiture rates for options granted to management 31.00% [4] 32.00% [4] 31.00% [4] 32.00% [4] 23.00% [4] 23.00% [4] 23.00% [4]
Estimated forfeiture rates for options granted to non-management         41.00% [4] 41.00% [4] 41.00% [4]
[1] Expected holding periods are based on the simplified method provided in Staff Accounting Bulletin No. 107 for “plain vanilla options.”
[2] Expected holding period is based on historical experience of similar awards, giving consideration to the contractual terms of the stock-based awards, vesting schedules and the expectations of future employee behavior.
[3] Weighted average volatility is based on the historical volatility of our common stock.
[4] Estimated forfeiture rates are based on historical data.