Comprehensive Income (Tables)

9 Months Ended

Sep. 30, 2011

Partners' Capital, Comprehensive Income [Abstract]

Comprehensive Income

8. Comprehensive Income

Comprehensive income consisted of:

	Three Months Ended September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
	(in thousands)
Net income	$	27,003		$	12,215	$	106,195		$	91,233
Other comprehensive income (loss), net of tax:
Unrealized gains (losses) on investments		(211	)		469		(25	)		53
Foreign currency translation adjustment		(4,672	)		11,751		2,867			1,161
Changes in employee benefit related items		(16	)		18		(3	)		4
		(4,899	)		12,238		2,839			1,218
Comprehensive income	$	22,104		$	24,453	$	109,034		$	92,451