Investments (Tables)

6 Months Ended

Sep. 30, 2012

Investments [Abstract]

Available-for-Sale Securities by Investment Category

	September 30, 2012
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
U.S. Treasury and government agencies	$	1,355	$	12	$	—		$	1,367
Mortgage-backed securities		5,248		23		(86	)		5,185
States and political subdivisions		1,430		30		—			1,460
Corporate debt securities		3,581		59		—			3,640
Marketable equity securities		3,860		334		(103	)		4,091
	$	15,474	$	458	$	(189	)	$	15,743
	March 31, 2012
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
U.S. Treasury and government agencies	$	1,371	$	11	$	(1	)	$	1,381
Mortgage-backed securities		3,946		17		(48	)		3,915
States and political subdivisions		1,186		26		—			1,212
Corporate debt securities		3,640		37		(1	)		3,676
Marketable equity securities		3,883		218		(83	)		4,018
	$	14,026	$	309	$	(133	)	$	14,202

Investment Securities in a Continuous Unrealized Loss Position

	September 30, 2012
	Less than 12 Months					12 Months or Longer					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Losses			Value		Losses			Value		Losses
Mortgage-backed securities	$	1,891	$	(86	)	$	—	$	—		$	1,891	$	(86	)
Marketable equity securities		540		(22	)		391		(81	)		931		(103	)
	$	2,431	$	(108	)	$	391	$	(81	)	$	2,822	$	(189	)

	March 31, 2012
	Less than 12 Months					12 Months or Longer				Total
	Fair		Unrealized			Fair		Unrealized		Fair		Unrealized
	Value		Losses			Value		Losses		Value		Losses
U.S. Treasury and government agencies	$	249	$	(1	)	$	—	$	—	$	249	$	(1	)
Mortgage-backed securities		2,509		(48	)		—		—		2,509		(48	)
Corporate debt securities		384		(1	)		—		—		384		(1	)
Marketable equity securities		1,194		(83	)		—		—		1,194		(83	)
	$	4,336	$	(133	)	$	—	$	—	$	4,336	$	(133	)

Contractual Maturity of Investment Securities

	September 30, 2012				March 31, 2012
	Amortized		Fair		Amortized		Fair
	Cost		Value		Cost		Value
Due in less than one year	$	2,522	$	2,531	$	1,355	$	1,359
Due after one year through five years		4,685		4,792		5,498		5,573
Due after five years through ten years		257		257		260		270
Due after ten years		4,150		4,072		3,030		2,982
	$	11,614	$	11,652	$	10,143	$	10,184