Deposits with Regulatory Authorities Deposit with Regulatory Authorities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets on deposit with state and other regulatory authorities	$ 16,566	$ 16,568
Debt securities held to maturity [Member]
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets on deposit with state and other regulatory authorities	15,281	15,279
Debt securities available for sale [Member]
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets on deposit with state and other regulatory authorities	810	814
Short-term investments [Member]
Schedule of Deposit with Regulatory Authorities [Line Items]
Assets on deposit with state and other regulatory authorities	$ 475	$ 475