Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Jul. 03, 2022	Dec. 31, 2021
Leases [Abstract]
2022	$ 10,288	$ 20,691
2023	18,136	16,853
2024	15,088	13,662
2025	13,779	12,348
2026	11,966	10,466
Thereafter	28,140	17,967
Total	$ 97,397	$ 91,987

Lessee, Operating and Finance Leases, Liability, to be Paid

No definition available.

Name:	bdc_LesseeOperatingAndFinanceLeasesLiabilityToBePaid
Namespace Prefix:	bdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Lessee, Operating and Finance Leases, Liability, to be Paid, Remainder of Fiscal Year

No definition available.

Name:	bdc_LesseeOperatingAndFinanceLeasesLiabilityToBePaidRemainderOfFiscalYear
Namespace Prefix:	bdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Lessee, Operating and Finance Leases, Liability, to be Paid, Thereafter

No definition available.

Name:	bdc_LesseeOperatingAndFinanceLeasesLiabilityToBePaidThereafter
Namespace Prefix:	bdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Lessee, Operating and Finance Leases, Liability, to be Paid, Year Four

No definition available.

Name:	bdc_LesseeOperatingAndFinanceLeasesLiabilityToBePaidYearFour
Namespace Prefix:	bdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Lessee, Operating and Finance Leases, Liability, to be Paid, Year One

No definition available.

Name:	bdc_LesseeOperatingAndFinanceLeasesLiabilityToBePaidYearOne
Namespace Prefix:	bdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Lessee, Operating and Finance Leases, Liability, to be Paid, Year Three

No definition available.

Name:	bdc_LesseeOperatingAndFinanceLeasesLiabilityToBePaidYearThree
Namespace Prefix:	bdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Lessee, Operating and Finance Leases, Liability, to be Paid, Year Two

No definition available.

Name:	bdc_LesseeOperatingAndFinanceLeasesLiabilityToBePaidYearTwo
Namespace Prefix:	bdc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

No definition available.