Investments Reconciliation, Investments by Category (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013 security		Mar. 31, 2012 security
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 188,930		$ 147,926
Available-for-sale Securities, Gross Unrealized Gains	5,083		4,603
Available-for-sale Securities, Gross Unrealized Losses	447		349
Available-for-sale Securities, Fair Value Disclosure	193,566		152,180
Available-for-sale, Securities in Unrealized Loss Positions, Less Than Twelve Months, Qualitative Disclosure, Number of Positions	53	[1]	30	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	436		331
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	76,653		46,794
Available-for-sale, Securities in Unrealized Loss Positions, Twelve Months or More, Qualitative Disclosure, Number of Positions	5	[1]	4	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	11		18
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	577		413
Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	29,178		69,993
Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	164,388		82,187
U.S. government and agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	88,356		95,296
Available-for-sale Securities, Gross Unrealized Gains	188		201
Available-for-sale Securities, Gross Unrealized Losses	259		289
Available-for-sale Securities, Fair Value Disclosure	88,285		95,208
Available-for-sale, Securities in Unrealized Loss Positions, Less Than Twelve Months, Qualitative Disclosure, Number of Positions	16		13
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	259		289
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	37,774		44,174
Available-for-sale, Securities in Unrealized Loss Positions, Twelve Months or More, Qualitative Disclosure, Number of Positions	0	[1]	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0
U.S. government and agency securities [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	24,651		66,710
U.S. government and agency securities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	63,634		28,498
States, municipalities and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	23,021		17,117
Available-for-sale Securities, Gross Unrealized Gains	2,125		1,918
Available-for-sale Securities, Gross Unrealized Losses	22		0
Available-for-sale Securities, Fair Value Disclosure	25,124		19,035
Available-for-sale, Securities in Unrealized Loss Positions, Less Than Twelve Months, Qualitative Disclosure, Number of Positions	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	22
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,892
Available-for-sale, Securities in Unrealized Loss Positions, Twelve Months or More, Qualitative Disclosure, Number of Positions	0	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
States, municipalities and political subdivisions [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0		0
States, municipalities and political subdivisions [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	25,124		19,035
Public Utility, Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	5,132		4,135
Available-for-sale Securities, Gross Unrealized Gains	233		225
Available-for-sale Securities, Gross Unrealized Losses	0		0
Available-for-sale Securities, Fair Value Disclosure	5,365		4,360
Public Utility, Bonds [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0
Public Utility, Bonds [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	5,365
All Other Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	68,438		28,282
Available-for-sale Securities, Gross Unrealized Gains	1,974		2,013
Available-for-sale Securities, Gross Unrealized Losses	147		1
Available-for-sale Securities, Fair Value Disclosure	70,265		30,294
Redeemable Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	226		259
Available-for-sale Securities, Gross Unrealized Gains	2		2
Available-for-sale Securities, Gross Unrealized Losses	0		1
Available-for-sale Securities, Fair Value Disclosure	228		260
Available-for-sale, Securities in Unrealized Loss Positions, Less Than Twelve Months, Qualitative Disclosure, Number of Positions	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0		0
Available-for-sale, Securities in Unrealized Loss Positions, Twelve Months or More, Qualitative Disclosure, Number of Positions	1	[1]	1
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	102		102
Redeemable Preferred Stock [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	228		260
Redeemable Preferred Stock [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0		0
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	185,173		145,089
Available-for-sale Securities, Gross Unrealized Gains	4,522		4,359
Available-for-sale Securities, Gross Unrealized Losses	428		291
Available-for-sale Securities, Fair Value Disclosure	189,267		149,157
Available-for-sale, Securities in Unrealized Loss Positions, Less Than Twelve Months, Qualitative Disclosure, Number of Positions	50	[1]	14	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	428		290
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	76,508		46,174
Available-for-sale, Securities in Unrealized Loss Positions, Twelve Months or More, Qualitative Disclosure, Number of Positions	1	[1]	1	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	102		102
Fixed Maturities [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	24,879		66,970
Fixed Maturities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	164,388		82,187
Public Utility, Equities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	316		316
Available-for-sale Securities, Gross Unrealized Gains	46		16
Available-for-sale Securities, Gross Unrealized Losses	0		6
Available-for-sale Securities, Fair Value Disclosure	362		326
Public Utility, Equities [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	362
Public Utility, Equities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0
Other Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	2,869		1,949
Available-for-sale Securities, Gross Unrealized Gains	515		228
Available-for-sale Securities, Gross Unrealized Losses	11		38
Available-for-sale Securities, Fair Value Disclosure	3,373		2,139
Nonredeemable Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	272		272
Available-for-sale Securities, Gross Unrealized Gains	0		0
Available-for-sale Securities, Gross Unrealized Losses	8		14
Available-for-sale Securities, Fair Value Disclosure	264		258
Available-for-sale, Securities in Unrealized Loss Positions, Less Than Twelve Months, Qualitative Disclosure, Number of Positions	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0		0
Available-for-sale, Securities in Unrealized Loss Positions, Twelve Months or More, Qualitative Disclosure, Number of Positions	2		2
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	8		14
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	264		258
Nonredeemable Preferred Stock [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	264		258
Nonredeemable Preferred Stock [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0		0
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	3,457		2,537
Available-for-sale Securities, Gross Unrealized Gains	561		244
Available-for-sale Securities, Gross Unrealized Losses	19		58
Available-for-sale Securities, Fair Value Disclosure	3,999		2,723
Available-for-sale, Securities in Unrealized Loss Positions, Less Than Twelve Months, Qualitative Disclosure, Number of Positions	3	[1]	16	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	8		41
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	145		620
Available-for-sale, Securities in Unrealized Loss Positions, Twelve Months or More, Qualitative Disclosure, Number of Positions	4	[1]	3	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	11		17
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	475		311
Equity Securities [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	3,999		2,723
Equity Securities [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0		0
Other Long-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	300		300
Available-for-sale Securities, Gross Unrealized Gains	0		0
Available-for-sale Securities, Gross Unrealized Losses	0		0
Available-for-sale Securities, Fair Value Disclosure	300		300
Other Long-term Investments [Member] | Level 1 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	300		300
Other Long-term Investments [Member] | Level 2 [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 0		$ 0

[1] This amount represents the actual number of discrete securities, not the number of shares of those securities. The numbers are not presented in thousands.