Goodwill impairment terminal growth rate percentage.

No definition available.

Name:	roll_GoodwillImpairmentTerminalGrowthRatePercentage
Namespace Prefix:	roll_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of increase discount rate.

+ References

No definition available.

+ Details

Name:	roll_PercentageOfDecreaseInTerminalGrowthRate
Namespace Prefix:	roll_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of exceede carrying value.

+ References

No definition available.

+ Details

Name:	roll_PercentageOfExceedeCarryingValue
Namespace Prefix:	roll_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Goodwill impairment test discount rate percentage.

+ References

No definition available.

+ Details

Name:	roll_PercentageOfGoodwillImpairmentTestDiscountRate
Namespace Prefix:	roll_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of increase discount rate.

+ References

No definition available.

+ Details

Name:	roll_PercentageOfIncreaseDiscountRate
Namespace Prefix:	roll_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

+ Details

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=roll_RepairStationCertificationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=roll_EngineeredProductsAndReportingUnitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Goodwill and Intangible Assets (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Mar. 31, 2018
Amortization of intangible assets	$ 2,400	$ 2,303	$ 7,331	$ 7,041
Goodwill	261,431		261,431		$ 268,124
Finite-Lived Intangible Assets, Net	91,692		91,692
Miami Division [Member]
Goodwill	6,691		6,691
Miami Division [Member] \| Repair Station Certifications [Member]
Finite-Lived Intangible Assets, Net	9,919		9,919
Miami Division [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets, Net	8,674		8,674
Miami Division [Member] \| Trade Names [Member]
Finite-Lived Intangible Assets, Net	$ 1,780		$ 1,780
Miami Division [Member] \| Engineered Products And Reporting Unit [Member]
Goodwill impairment test discount rate percentage			11.00%
Goodwill impairment terminal growth rate percentage			2.50%
Percentage of decrease in terminal growth rate			1.00%
Percentage of increase discount rate			1.00%
Percentage of exceeded carrying value			21.90%