Investments (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Summary of securities with gross unrealized loss positions aggregated by investment category
Gross Unrealized Loss, Less than Twelve Months	$ (88)
Fair Value, Less than Twelve Months	3,730
Gross Unrealized Loss, Twelve Months or Greater	(31)
Fair Value, Twelve Months or Greater	192
Gross Unrealized Loss, Total	(119)
Fair Value, Total	3,922
Fixed-maturity securities [Member]
Summary of securities with gross unrealized loss positions aggregated by investment category
Gross Unrealized Loss, Less than Twelve Months	(8)
Fair Value, Less than Twelve Months	1,078
Gross Unrealized Loss, Total	(8)
Fair Value, Total	1,078
Fixed-maturity securities [Member] | Corporate bonds [Member]
Summary of securities with gross unrealized loss positions aggregated by investment category
Gross Unrealized Loss, Less than Twelve Months	(3)
Fair Value, Less than Twelve Months	442
Gross Unrealized Loss, Total	(3)
Fair Value, Total	442
Fixed-maturity securities [Member] | Commercial mortgage-backed securities [Member]
Summary of securities with gross unrealized loss positions aggregated by investment category
Gross Unrealized Loss, Less than Twelve Months	(4)
Fair Value, Less than Twelve Months	356
Gross Unrealized Loss, Total	(4)
Fair Value, Total	356
Fixed-maturity securities [Member] | State, municipalities, and political subdivisions [Member]
Summary of securities with gross unrealized loss positions aggregated by investment category
Gross Unrealized Loss, Less than Twelve Months	(1)
Fair Value, Less than Twelve Months	226
Gross Unrealized Loss, Total	(1)
Fair Value, Total	226
Fixed-maturity securities [Member] | Redeemable preferred stock [Member]
Summary of securities with gross unrealized loss positions aggregated by investment category
Fair Value, Less than Twelve Months	54
Fair Value, Total	54
Equity securities [Member]
Summary of securities with gross unrealized loss positions aggregated by investment category
Gross Unrealized Loss, Less than Twelve Months	(80)
Fair Value, Less than Twelve Months	2,652
Gross Unrealized Loss, Twelve Months or Greater	(31)
Fair Value, Twelve Months or Greater	192
Gross Unrealized Loss, Total	(111)
Fair Value, Total	$ 2,844