Employee Benefit Plans - Arrow SERP and Wyle Defined Benefit Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 7,574	$ 7,572	$ 7,151
Defined Benefit Plan, Fair Value of Plan Assets	$ 46,663	$ 71,470
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Long-Term Return on Assets	5.25%	4.75%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	4.75%	6.25%
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 90,368	$ 84,561
Defined Benefit Plan, Benefit Obligation	97,607	91,038	88,729
Defined Benefit Plan, Service Cost	2,310	1,689
Defined Benefit Plan, Interest Cost	3,552	3,475
Defined Benefit Plan, Actuarial Net (Gains) Losses	4,929	1,021
Defined Benefit Plan, Benefits Paid	(4,222)	(3,876)
Defined Benefit Plan, Lum Sum Payments	0	0
Defined Benefit Plan, Funded Status of Plan	(97,607)	(91,038)
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(4,535)	(4,556)
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	(93,072)	(86,482)
Defined Benefit Plan, Expected Return on Plan Assets	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	(1,216)	(3,208)
Settlement charge	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 7,078	$ 8,372
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.50%	4.00%
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	4.00%	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	$ 4,535
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	5,902
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	5,852
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	5,797
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	5,998
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	32,652
Funding in Rabbi Trust	86,587
Wyle Defined Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	60,374	$ 97,984
Defined Benefit Plan, Benefit Obligation	60,374	97,984	129,029
Defined Benefit Plan, Service Cost	0	0
Defined Benefit Plan, Interest Cost	3,860	4,485
Defined Benefit Plan, Actuarial Net (Gains) Losses	7,595	(3,244)
Defined Benefit Plan, Benefits Paid	(6,080)	(6,223)
Defined Benefit Plan, Lum Sum Payments	(42,985)	(26,063)
Defined Benefit Plan, Fair Value of Plan Assets	46,663	71,470	$ 101,859
Defined Benefit Plan, Actual Return on Plan Assets	10,258	1,897
Defined Benefit Plan, Contributions by Employer	14,000	0
Defined Benefit Plan, Settlements, Plan Assets	(42,985)	(26,063)
Defined Benefit Plan, Funded Status of Plan	(13,711)	(26,514)
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	0	0
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	(13,711)	(26,514)
Defined Benefit Plan, Expected Return on Plan Assets	(3,449)	(5,273)
Defined Benefit Plan, Amortization of Gains (Losses)	(1,666)	(1,827)
Settlement charge	16,706	12,211
Defined Benefit Plan, Net Periodic Benefit Cost	$ 18,783	$ 13,250
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.60%	4.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.00%	4.25%
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 3,133
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	3,216
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	3,232
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	3,273
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	3,361
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	17,207
Defined Benefit Plan, Expected Contributions in Current Fiscal Year	$ 15,000
Other Restructuring [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		$ (12,211)