Property and equipment (Tables)

3 Months Ended

Mar. 31, 2015

Property and equipment — net consist of the following (dollar amounts in thousands):


	Estimated Useful Life (Years)		March 31, 2015			December 31, 2014
Land		—	$	5,273		$	5,273
Buildings		39-40		54,948			54,948
Building improvements		5-40		114,131			114,131
Machinery and equipment		3-15		82,120			80,919
Furniture, fixtures and office equipment		5-10		5,015			5,015
Computer equipment and software		3		10,499			10,465
Leasehold improvements		4		17			17
Construction in progress				41,997			39,580

				314,000			310,348
Less accumulated depreciation and amortization				(120,546	)		(118,221	)

Property and equipment — net			$	193,454		$	192,127