Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
	Nov. 04, 2015	Dec. 31, 2015	Dec. 31, 2015	Sep. 30, 2015
Assets and liabilities measured at fair value on a recurring basis
Contingent consideration payments related to acquisitions of businesses			$ (1,679)
TeraLogics
Assets and liabilities measured at fair value on a recurring basis
Change in fair value of contingent consideration since the date of the acquisition			$ 0
Debt instruments
Volatility earning metrics			18.00%
H4 Global
Assets and liabilities measured at fair value on a recurring basis
Contingent consideration paid based upon contracts entered period	5 years		5 years
Change in fair value of contingent consideration since the date of the acquisition			$ 0
DTECH
Assets and liabilities measured at fair value on a recurring basis
Change in fair value of contingent consideration since the date of the acquisition			$ 0
Liabilities
Noncurrent contingent consideration to seller of Teralogics - contract extensions		$ 5,000
Debt instruments
Volatility earning metrics			20.00%
Level 2
Debt instruments
Fair Value		122,400	$ 122,400	$ 125,800
Carrying value		126,500	126,500	126,700
Level 3 | DTECH
Assets and liabilities measured at fair value on a recurring basis
Balance at the Beginning period			7,507
Contingent consideration payments related to acquisitions of businesses			(5,000)
Total remeasurement recognized in earnings			809
Balance at the ending period		3,316	3,316
Assets and liabilities measured at fair value
Assets
Cash equivalents		65,035	65,035	68,194
Marketable securities		23,612	23,612	30,533
Current derivative assets		18,966	18,966	11,543
Noncurrent derivative assets		3,324	3,324	13,909
Marketable securities in rabbi trust		803	803	992
Total assets measured at fair value		111,740	111,740	125,171
Liabilities
Current derivative liabilities		18,432	18,432	9,370
Noncurrent derivative liabilities		3,355	3,355	13,909
Total liabilities measured at fair value		31,571	31,571	30,786
Assets and liabilities measured at fair value | TeraLogics
Liabilities
Noncurrent contingent consideration to seller of Teralogics - contract extensions			1,800
Noncurrent contingent consideration to seller		3,100	3,100
Assets and liabilities measured at fair value | H4 Global
Liabilities
Noncurrent contingent consideration to seller		1,568	1,568
Assets and liabilities measured at fair value | DTECH
Liabilities
Noncurrent contingent consideration to seller		945	945	2,507
Current contingent consideration to seller of DTECH		2,371	2,371	5,000
Assets and liabilities measured at fair value | Level 1
Assets
Cash equivalents		65,035	65,035	68,194
Marketable securities in rabbi trust		803	803	992
Total assets measured at fair value		65,838	65,838	69,186
Assets and liabilities measured at fair value | Level 2
Assets
Marketable securities		23,612	23,612	30,533
Current derivative assets		18,966	18,966	11,543
Noncurrent derivative assets		3,324	3,324	13,909
Total assets measured at fair value		45,902	45,902	55,985
Liabilities
Current derivative liabilities		18,432	18,432	9,370
Noncurrent derivative liabilities		3,355	3,355	13,909
Total liabilities measured at fair value		21,787	21,787	23,279
Assets and liabilities measured at fair value | Level 3
Liabilities
Total liabilities measured at fair value		9,784	9,784	7,507
Assets and liabilities measured at fair value | Level 3 | TeraLogics
Liabilities
Noncurrent contingent consideration to seller of Teralogics - contract extensions			1,800
Noncurrent contingent consideration to seller		3,100	3,100
Assets and liabilities measured at fair value | Level 3 | H4 Global
Liabilities
Noncurrent contingent consideration to seller		1,568	1,568
Assets and liabilities measured at fair value | Level 3 | DTECH
Liabilities
Noncurrent contingent consideration to seller		945	945	2,507
Current contingent consideration to seller of DTECH		$ 2,371	$ 2,371	$ 5,000