Investments (Tables)

3 Months Ended

Jul. 30, 2016

Investments

Schedule of investments

Investments consist of the following (in thousands):

	July 30,		April 30,
	2016		2016
Short-term investments:
Held-to-maturity securities:
Municipal securities	$	35,121	$	42,179
U.S. government securities		23,176		21,184
Corporate bonds		43,505		40,041
Total held-to-maturity investments	$	101,802	$	103,404
Total short-term investments	$	101,802	$	103,404
Long-term investments:
Held-to-maturity securities:
Municipal securities	$	3,738	$	—
U.S. government securities		4,006		7,518
Corporate bonds		22,943		23,561
Total held-to-maturity investments		30,687		31,079
Available-for-sale securities:
Auction rate securities		2,410		2,780
Total available-for-sale investments		2,410		2,780
Total long-term investments	$	33,097	$	33,859

Held-to-maturity securities

Investments

Schedule of amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of held-to-maturity investments

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the held-to-maturity investments as of July 30, 2016, were as follows (in thousands):

	July 30, 2016
			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Municipal securities	$	38,859	$	24	$	—	$	38,883
U.S. government securities		27,182		27		—		27,209
Corporate bonds		66,448		66		(12)		66,502
Total held-to-maturity investments	$	132,489	$	117	$	(12)	$	132,594

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the held-to-maturity investments as of April 30, 2016, were as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
Municipal securities	$	42,179	$	5	$	(7)	$	42,177
U.S. government securities		28,702		23		—		28,725
Corporate bonds		63,602		54		(32)		63,624
Total held-to-maturity investments	$	134,483	$	82	$	(39)	$	134,526

Schedule of amortized cost and fair value by contractual maturity

The amortized cost and fair value of the held-to-maturity securities by contractual maturity at July 30, 2016, were as follows (in thousands):

	Cost		Fair Value
Due within one year	$	101,802	$	101,855
Due after one year through five years		30,687		30,739
Total	$	132,489	$	132,594

Available-for-sale securities | Auction rate securities

Investments

Schedule of amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of held-to-maturity investments

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the auction rate securities as of July 30, 2016, were as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Auction rate securities	$	2,700	$	—	$	(290)	$	2,410
Total available-for-sale investments	$	2,700	$	—	$	(290)	$	2,410

The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the auction rate securities as of April 30, 2016, were as follows (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Auction rate securities	$	3,100	$	—	$	(320)	$	2,780
Total available-for-sale investments	$	3,100	$	—	$	(320)	$	2,780

Schedule of amortized cost and fair value by contractual maturity

The amortized cost and fair value of the auction rate securities by contractual maturity at July 30, 2016, were as follows (in thousands):

	Cost		Fair Value
Due after one through five years	$	700	$	675
Due after 10 years		2,000		1,735
Total	$	2,700	$	2,410