CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income (loss)	$ (10,937)	$ 8,779	$ (4,335)
Other comprehensive income (loss), net of tax:
Changes in cumulative translation adjustments, net of tax	395	(173)	(390)
Translation adjustments reclassified into earnings upon sale or liquidation of subsidiaries, net of tax			89
Foreign currency translation adjustments, net of tax	395	(173)	(301)
Changes in unrealized gain (loss) on investment arising during the period, net of tax	15	10	(140)
Gain (loss) on investments reclassified into earnings upon sale of investments, net of tax			(236)
Gain (loss) on investments, net of tax	15	10	(376)
Other comprehensive income (loss) net of tax	410	(163)	(677)
Comprehensive income (loss)	$ (10,527)	$ 8,616	$ (5,012)