Investments (Unrealized Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Available-for-Sale Securities and Held-to-Maturity Securities [Line Items]
Credit impairment reported in earnings	$ 0	$ 178	$ 35	$ 239
Asset-Backed Security [Member]
Available-for-Sale Securities and Held-to-Maturity Securities [Line Items]
Securities, other-than-temporarily impaired	1
Credit impairment reported in earnings	$ 7
Equity Securities [Member]
Available-for-Sale Securities and Held-to-Maturity Securities [Line Items]
Gross unrealized losses, number of securities rated investment grade	10		10
Other-than-temporarily impaired securities, number of securities rated investment grade	1		1
Debt Securities [Member]
Available-for-Sale Securities and Held-to-Maturity Securities [Line Items]
Gross unrealized losses, number of issues	219		219
Gross unrealized losses, percentage of total debt	16.80%		16.80%
Gross unrealized losses, market value as a percent of amortized cost	97.60%		97.60%
Gross unrealized losses, number of securities with maturities of 12 months or greater	201		201
Gross unrealized losses, number of securities with maturities of 12 months or greater (as a percentage)	91.80%		91.80%
Debt Securities [Member] | Investment Grade [Member]
Available-for-Sale Securities and Held-to-Maturity Securities [Line Items]
Gross unrealized losses, number of securities rated investment grade	214		214