|
Inventories - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Reserve for inventory valuation | $ 12.3us-gaap_InventoryValuationReserves | $ 11.0us-gaap_InventoryValuationReserves |
| Percentage of reserve for inventory valuation | 9.60%atro_InventoryValuationReservesAsPercentageOfGrossInventory | 11.50%atro_InventoryValuationReservesAsPercentageOfGrossInventory |
| X | ||||||||||
|
- Definition
Inventory valuation reserves as percentage of gross inventory. No definition available.
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Amount of valuation reserve for inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|