Comprehensive income

9 Months Ended

Sep. 30, 2011

Stockholders' Equity Note [Abstract]

Comprehensive Income (Loss) Note [Text Block]

Comprehensive income

Comprehensive income consists of the following:

	Three months ended September 30,						Nine months ended September 30,
	2010			2011			2010			2011
Net income	$	8,758		$	8,211		$	23,383		$	25,886
Other comprehensive income:
Pension liability, net of
income tax	207			249			621			746
Cash flow hedging gain (loss),
net of income tax	(2,876		)	4,292			(1,412		)	3,517
Foreign currency
translation adjustment	7,468			(6,315		)	114			(886		)
Comprehensive income	$	13,557		$	6,437		$	22,706		29,263

Accumulated other comprehensive income (loss) consists of the following:

	Cash Flow Hedging Gain (Loss)			Pension Liability			Cumulative Translation Adjustments			Accumulated Other Comprehensive Income (Loss)
Balance, December 31, 2010	$	(1,245	)	$	(18,482	)	$	3,866		$	(15,861	)
Pension liability,
net of income tax	—			746			—			746
Cash flow hedging gain,
net of income tax	3,517			—			—			3,517
Foreign currency translation
adjustments	—			—			(886		)	(886		)
Balance, September 30, 2011	$	2,272		$	(17,736	)	$	2,980		$	(12,484	)