Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2014

Property, Plant and Equipment [Abstract]

Property, plant and equipment

Property, plant and equipment consist of the following (in thousands):

	March 31, 2014			December 31, 2013
Land	$	1,764		$	1,764
Facilities and equipment	870,251			855,318
Capital leases	9,015			16,133
	881,030			873,215
Accumulated amortization	(411,446		)	(395,520		)
	469,584			477,695
Construction in progress	7,253			8,578
	$	476,837		$	486,273