Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Employee Benefit Plans [Abstract]

Periodic Benefit Expense Net

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2011			2010			2011			2010
Service cost	$	729		$	511		$	3,742		$	1,322
Interest cost		301			337			952			1,148
Expected return on assets		(742	)		(248	)		(2,370	)		(3,191	)
Prior service costs		158			160			509			535
Settlement loss		2,887			894			2,887			2,486
Curtailment charges		326			—			2,039			1,347
Net periodic expense	$	3,659		$	1,654		$	7,759		$	3,647