CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Activities
Net (loss) income	$ (26,462)	$ (19,383)	$ 4,649
Income from discontinued operations			4,640
(Loss) income from continuing operations	(26,462)	(19,383)	9
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	15,750	17,155	15,977
Impairment of property, plant and equipment	2,381	4,112	1,756
Non-cash compensation cost	1,602	2,108	1,987
Deferred income taxes	(253)	1,116	7,050
Other, net	13	(162)	22
Changes in operating assets and liabilities:
Trade accounts receivable, net	8,909	4,358	108
Prepaid expenses and other assets	1,407	469	(3,401)
Accounts payable	87	2,711	(1,374)
Income taxes, net	(339)	5,764	(3,528)
Accrued and other liabilities	(4,363)	(3,531)	(617)
Net cash (used in) provided by continuing operating activities	(1,268)	14,717	17,989
Cash used in discontinued operating activities			(2,335)
Net cash (used in) provided by operating activities	(1,268)	14,717	15,654
Investing Activities
Proceeds from disposition of available for sale investments		606	8,019
Proceeds from note receivable	660	275
Purchases of property, plant and equipment	(8,958)	(16,942)	(14,683)
Net cash used in continuing investing activities	(8,298)	(16,061)	(6,664)
Cash provided by discontinued investing activities			7,075
Net cash (used in) provided by investing activities	(8,298)	(16,061)	411
Financing Activities
Proceeds from stock option exercises	111	175	20
Principal payments on borrowings			(6,855)
Proceeds from line of credit	2,809	2,011	22,236
Principal payments on line of credit	(2,809)	(2,011)	(22,236)
Net proceeds from the issuance of common stock	123	242	251
Principal payments on capital lease obligations	(85)	(147)	(265)
Net cash provided by (used in) financing activities	149	270	(6,849)
Effect of exchange rate changes on cash	396	223	795
Net (decrease) increase in cash and cash equivalents	(9,021)	(851)	10,011
Cash and cash equivalents at beginning of period	18,740	19,591	9,580
Cash and cash equivalents at end of period	9,719	18,740	19,591
Supplemental Disclosure of Cash Flow Information
Cash paid for interest	8	57	166
Cash paid for income taxes	370	233	750
Property, plant and equipment acquired or refinanced under long-term debt			290
Property, plant and equipment sold under a note receivable		$ 2,915