Consolidated Statement Of Shareholders' Equity (USD $) In Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Total
Balance, value at Dec. 31, 2010	$ 305	$ 231,999	$ 212,914	$ (2,060)	$ (2,305)	$ 440,853
Balance, shares at Dec. 31, 2010	30,516				219
Net income			16,214			16,214
Foreign currency translation adjustment				3,211		3,211
Adjustment to post-retirement health care liability, net of taxes of $23				38		38
Adjustment to retirement benefit liability, net of taxes of $39				(62)		(62)
Stock compensation expense		3,132				3,132
Net settlement of restricted stock units, value	2	(2)			(819)	(819)
Net settlement of restricted stock units, shares	174				61
Issuance of restricted stock	6
Stock options exercised, shares	1
Stock options exercised, value		10				10
Balance, value at Jun. 30, 2011	$ 307	$ 235,139	$ 229,128	$ 1,127	$ (3,124)	$ 462,577
Balance, shares at Jun. 30, 2011	30,697				280