Summary of Significant Accounting Policies (Revenue Recognition) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Pre-contract costs included in inventory	$ 2.3	$ 2.0
Percentage of pre-contract inventory (less than)	1.00%	1.00%

Pre-Contract Inventory Including Materials or Tooling

No definition available.

Name:	kamn_PreContractInventoryIncludingMaterialsOrTooling
Namespace Prefix:	kamn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant