Fair Value of Financial Instruments (Tables)

3 Months Ended

Dec. 31, 2012

Fair Value of Financial Instruments

Summary of assets and liabilities measured and recorded at fair value on Balance Sheet on a recurring basis

	December 31, 2012
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	128,080	$	—	$	—	$	128,080
Current derivative assets	—		2,552		—		2,552
Noncurrent derivative assets	—		2,612		—		2,612
Total assets measured at fair value	$	128,080	$	5,164	$	—	$	133,244
Liabilities
Current derivative liabilities	$	—	$	5,564	$	—	$	5,564
Noncurrent derivative liabilities	—		4,304		—		4,304
Contingent consideration to Seller of NEK	—		—		11,684		11,684
Total liabilities measured at fair value	$	—	$	9,868	$	11,684	$	21,552

	September 30, 2012
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents	$	171,300	$	—	$	—	$	171,300
Current derivative assets	—		3,779		—		3,779
Noncurrent derivative assets	—		3,713		—		3,713
Total assets measured at fair value	$	171,300	$	7,492	$	—	$	178,792
Liabilities
Current derivative liabilities	$	—	$	6,839	$	—	$	6,839
Noncurrent derivative liabilities	—		6,498		—		6,498
Total liabilities measured at fair value	$	—	$	13,337	$	—	$	13,337