Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value of Financial Instruments

Schedule of assets and liabilities measured at fair value on a recurring basis

	December 31, 2011
	Fair Value Measurements Using
							Total Fair Value
(in thousands)	Level 1		Level 2		Level 3
Assets:
Equity securities, trading	$	12,369	$	—	$	—	$	12,369
Equity securities, available-for-sale		12,099		—		—		12,099
Interest rate cap		—		432		—		432
Natural gas hedge		—		4,050		—		4,050
Total assets	$	24,468	$	4,482	$	—	$	28,950
Liabilities:
Interest rate swaps	$	—	$	5,683	$	—	$	5,683