Marketable Investment Securities

3 Months Ended

Sep. 30, 2017

Investments Debt And Equity Securities [Abstract]

(3)	MARKETABLE INVESTMENT SECURITIES

The Company has classified its marketable investment securities as available-for-sale securities. These securities are carried at estimated fair value with unrealized holding gains and losses, net of the related tax effect, included in accumulated other comprehensive loss in stockholders’ equity until realized. Gains and losses on investment security transactions are reported on the specific-identification method. Dividend and interest income are recognized when earned. The amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of security at September 30, 2017 and June 30, 2017 were as follows:

			Gross		Gross
			unrealized		unrealized
	Amortized		holding		holding			Estimated
	cost		gains		losses			fair value
At September 30, 2017:
Cash and cash equivalents:
Cash	$	82.3	$	—	$	—		$	82.3
Cash equivalents		5.6		—		—		$	5.6
Total cash and cash equivalents		87.9		—		—			87.9
Available-for-sale:
Corporate bonds and notes		62.2		0.1		(0.1	)		62.2
Municipal bonds		31.2		—		—			31.2
Federal agency issues		9.5		—		—			9.5
US government securities		7.6		—		—			7.6
Total	$	198.4	$	0.1	$	(0.1	)	$	198.4

			Gross		Gross
			unrealized		unrealized
	Amortized		holding		holding			Estimated
	cost		gains		losses			fair value
At June 30, 2017:
Cash and cash equivalents:
Cash	$	83.5	$	—	$	—		$	83.5
Cash equivalents		18.9		—		—			18.9
Total cash and cash equivalents		102.4		—		—			102.4
Available-for-sale:
Corporate bonds and notes		45.4		0.1		(0.1	)		45.4
Municipal bonds		32.7		—		—			32.7
Federal agency issues		11.6		—		(0.1	)		11.5
US government securities		7.2		—		—			7.2
Total	$	199.3	$	0.1	$	(0.2	)	$	199.2

Cash, cash equivalents, and maturities of debt securities classified as available-for-sale securities are as follows at September 30, 2017:

	Amortized		Estimated
	cost		fair value
Cash	$	82.3	$	82.3
Cash equivalents		5.6		5.6
Available-for-sale:
Due within one year		60.4		60.4
Due after one year through five years		50.1		50.1
Due after five years		—		—
Total	$	198.4	$	198.4