Business Combination (Tables)

12 Months Ended

Dec. 31, 2012

Keystone Acquisition

Business Combination

Schedule of purchase price allocation

The following table summarizes the purchase price allocation for the Keystone Acquisition (in thousands):

Assets:
Cash	$	2,837
Accounts receivable		1,756
Inventory		86
Property, plant and equipment		136,593
Goodwill		74,256
Intangible asset		304,708
Liabilities:
Accounts payable		(12,117	)
Other short-term liabilities		(175	)
Other long-term liabilities		(632	)
Total	$	507,312

Langley Acquisition

Business Combination

Schedule of purchase price allocation

The following table summarizes the purchase price allocation for the Langley Acquisition (in thousands):

Property, plant and equipment	$	136,525
Goodwill		58,497
Intangible asset		33,900
Inventory		1,806
Total	$	230,728