Condensed Consolidated Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities
Net Income	$ 14,191	$ 13,112
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	3,056	3,057
Amortization	879	746
Equity in undistributed earnings of associated companies, net of dividends	921	(381)
Deferred compensation and other, net	(861)	(103)
Stock-based compensation	1,040	1,186
Gain on disposal of property, plant and equipment	(2)	(14)
Insurance settlement realized	0	(483)
Pension and other postretirement benefits	(2,521)	(2,357)
(Decrease) increase in cash from changes in current assets and current liabilities, net of acquisitions:
Accounts receivable	(3,977)	(9,764)
Inventories	(1,837)	352
Prepaid expenses and other current assets	(457)	(557)
Accounts payable and accrued liabilities	874	1,938
Net cash provided by operating activities	11,306	6,732
Cash flows from investing activities
Investments in property, plant and equipment	(2,723)	(3,178)
Payments related to acquisitions, net of cash acquired	(647)	0
Proceeds from disposition of assets	13	64
Insurance settlement received and interest earned	14	18
Change in restricted cash, net	(14)	465
Net cash used in investing activities	(3,357)	(2,631)
Cash flows from financing activities
Net increase in short-term borrowings	594	0
Proceeds from long-term debt	0	1,350
Repayment of long-term debt	(2,438)	(189)
Dividends paid	(3,208)	(3,105)
Stock options exercised, other	(59)	(1,288)
Excess Tax Benefit Related to Stock Option Exercises, Cash Flow	369	546
Net cash used in financing activities	(4,742)	(2,686)
Effect of exchange rate changes on cash	(498)	640
Net increase in cash and cash equivalents	2,709	2,055
Cash and cash equivalents at beginning of period	32,547	16,909
Cash and cash equivalents at end of period	35,256	18,964
Other Noncash Investing And Financing Items [Abstract]
Excess Tax Benefit Related to Stock Option Exercises	$ 0	$ 706