Employee Benefit Plans - Arrow SERP and Wyle Defined Benefit Plan (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($) Employees	Dec. 31, 2019 USD ($) Employees	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 7,503	$ 7,574
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 93,385	$ 93,385	82,951
Defined Benefit Plan, Benefit Obligation	101,817	101,817	90,578	97,607
Defined Benefit Plan, Service Cost		2,874	3,103
Defined Benefit Plan, Interest Cost		3,710	3,338
Defined Benefit Plan, Benefit Obligation, Actuarial (Gain) Loss		9,210	(8,874)
Defined Benefit Plan, Benefit Obligation, Benefits Paid		4,555	4,596
Defined Benefit Plan, Lum Sum Payments		0	0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(101,817)	(101,817)	(90,578)
Liability, Defined Benefit Plan, Current	(4,535)	(4,535)	(4,532)
Liability, Defined Benefit Plan, Noncurrent	$ (97,282)	(97,282)	(86,046)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets		0	0
Defined Benefit Plan, Amortization of Gain (Loss)		(100)	(1,531)
Settlement charge		0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		$ 6,684	$ 7,972
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.10%	3.10%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	5.00%	5.00%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		4.20%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase		5.00%	5.00%
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 4,535	$ 4,535
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	5,882	5,882
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	6,037	6,037
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	6,426	6,426
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	6,611	6,611
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	34,043	34,043
Funding in Rabbi Trust	94,255	94,255
Wyle Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	0	0	$ 59,399
Defined Benefit Plan, Benefit Obligation	0	0	59,399	60,374
Defined Benefit Plan, Service Cost		0	0
Defined Benefit Plan, Interest Cost		1,130	2,114
Defined Benefit Plan, Benefit Obligation, Actuarial (Gain) Loss		1,500	(322)
Defined Benefit Plan, Benefit Obligation, Benefits Paid		2,718	2,767
Defined Benefit Plan, Lum Sum Payments		(59,311)	0	(42,985)
Defined Benefit Plan, Plan Assets, Amount	502	502	54,925	46,663
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)		7,606	29
Defined Benefit Plan, Plan Assets, Contributions by Employer		0	11,000
Defined Benefit Plan, Plan Assets, Benefits Paid		(2,718)	(2,767)
Defined Benefit Plan, Plan Assets, Payment for Settlement		(59,311)	0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	502	502	(4,474)
Assets for Plan Benefits, Defined Benefit Plan	502	502
Liability, Defined Benefit Plan, Current	0	0	(4,474)
Liability, Defined Benefit Plan, Noncurrent	0	0	0
Defined Benefit Plan, Expected Return (Loss) on Plan Assets		(954)	(2,648)
Defined Benefit Plan, Amortization of Gain (Loss)		(820)	(702)
Settlement charge	$ 20,111	20,111	0	$ 16,706
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		$ 21,107	$ 168
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			2.60%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Long-Term Return on Assets			2.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		2.60%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets			5.25%
Current Arrow SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of Participants | Employees	9	9
Former Arrow SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of Participants | Employees	23	23