Inventories (Tables)

12 Months Ended

Dec. 31, 2011

Inventories [Abstract]

Inventories used in determining cost of sales

Inventories used in determining cost of sales were as follows:

(Thousands of dollars)	2011		2010
Gross inventories @ FIFO:
Finished goods	$	11,914	$	7,757
Work in progress		27,749		26,680
Raw materials & component parts		144,731		99,440
Maintenance, tooling & supplies		17,001		14,156
Total gross inventories @ FIFO		201,395		148,033
Less reserves:
LIFO		32,103		28,776
Valuation		3,144		2,383
Total inventories as reported	$	166,148	$	116,874