Employee Benefit Plans - Arrow SERP and Wyle Defined Benefit Plan (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Employees	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 7,503	$ 7,574	$ 7,572
Defined Benefit Plan, Fair Value of Plan Assets	$ 54,925	46,663
Settlement charge		$ 16,706
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Long-Term Return on Assets	2.25%	5.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.25%	4.75%
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 82,951	$ 90,368
Defined Benefit Plan, Benefit Obligation	90,578	97,607	91,038
Defined Benefit Plan, Service Cost	3,103	2,310
Defined Benefit Plan, Interest Cost	3,338	3,552
Defined Benefit Plan, Benefit Obligation, Actuarial (Gain) Loss	(8,874)	4,929
Defined Benefit Plan, Benefit Obligation, Benefits Paid	4,596	4,222
Defined Benefit Plan, Lum Sum Payments	0	0
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(90,578)	(97,607)
Liability, Defined Benefit Plan, Current	(4,532)	(4,535)
Liability, Defined Benefit Plan, Noncurrent	(86,046)	(93,072)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	(1,531)	(1,216)
Settlement charge	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 7,972	$ 7,078
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.20%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	5.00%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.50%	4.00%
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	$ 4,532
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	4,481
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	5,825
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	6,058
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	6,405
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	33,724
Funding in Rabbi Trust	81,962
Wyle Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	59,399	$ 60,374
Defined Benefit Plan, Benefit Obligation	59,399	60,374	97,984
Defined Benefit Plan, Service Cost	0	0
Defined Benefit Plan, Interest Cost	2,114	3,860
Defined Benefit Plan, Benefit Obligation, Actuarial (Gain) Loss	(322)	7,595
Defined Benefit Plan, Benefit Obligation, Benefits Paid	2,767	6,080
Defined Benefit Plan, Lum Sum Payments	0	(42,985)	(26,063)
Defined Benefit Plan, Fair Value of Plan Assets	54,925	46,663	71,470
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	29	10,258
Defined Benefit Plan, Plan Assets, Contributions by Employer	11,000	14,000
Defined Benefit Plan, Plan Assets, Benefits Paid	(2,767)	(6,080)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(42,985)
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(4,474)	(13,711)	(13,711)
Liability, Defined Benefit Plan, Current	(4,474)	0
Liability, Defined Benefit Plan, Noncurrent	0	(13,711)
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(2,648)	(3,449)
Defined Benefit Plan, Amortization of Gain (Loss)	(702)	(1,666)
Settlement charge	0	16,706	$ 12,211
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 168	$ 18,783
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%	3.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.60%	4.00%
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 60,530
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year, Description	$ 4,700
Current Arrow SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of Participants | Employees	10
Former Arrow SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of Participants | Employees	22
Wyle Defined Benefit Plan Expected Settlement [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 25,500