Financial Instruments and Fair Value Measurement (Tables)

9 Months Ended

Jun. 30, 2017

Financial Instruments and Fair Value Measurement

Summary of available-for-sale securities

			Gross		Gross		Estimated
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(in thousands)
Equity Securities:
June 30, 2017	$	38,473	$	27,067	$	(2,160)	$	63,380
September 30, 2016	$	38,473	$	33,051	$	—	$	71,524

Summary of assets and liabilities measured at fair value

The following table summarizes our assets and liabilities measured at fair value presented in our Consolidated Condensed Balance Sheet as of June 30, 2017:

	Fair Value		(Level 1)		(Level 2)		(Level 3)
	(in thousands)
Recurring fair value measurements:
Short-term investments:
Certificate of deposit	$	4,600	$	—	$	4,600	$	—
Corporate and municipal debt securities		13,877		—		13,877		—
U.S. government and federal agency securities		21,417		17,419		3,998		—
Total short-term investments		39,894		17,419		22,475		—
Cash and cash equivalents		572,787		572,787		—		—
Investments		63,380		63,380		—		—
Other current assets		32,917		32,667		250		—
Other assets		6,690		6,690		—		—
Total assets measured at fair value	$	715,668	$	692,943	$	22,725	$	—
Liabilities
Contingent earnout liability	$	14,509	$	—	$	—	$	14,509

Summary of supplemental fair value information about long-term fixed-rate debt

	June 30,		September 30,
	2017		2016
	(in millions)
Carrying value of long-term fixed-rate debt	$	492.6	$	491.8
Fair value of long-term fixed-rate debt	$	527.2	$	529.6