Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 313,370	$ 76,970	$ 69,230	$ 254,291
Accounts receivable	713,226	596,647
Accounts receivable - affiliate	3,997	0
Inventories	1,711,851	1,445,517
Prepaid expense and other current assets	61,715	55,843
Total current assets	2,804,159	2,174,977
Property, plant and equipment, net	1,788,884	1,781,589
Deferred charges and other assets, net	284,143	262,479
Total assets	4,877,186	4,219,045
Current liabilities:
Accounts payable	339,185	402,293
Accounts payable - affiliate	7,782	0
Accrued expenses	1,496,834	1,210,945
Current portion of long-term debt	13,009	12,029
Deferred revenue	6,134	7,766
Total current liabilities	1,862,944	1,633,033
Delaware Economic Development Authority loan	12,000	12,000
Long-term debt	720,637	723,547
Intercompany notes payable	88,403	31,835
Other long-term liabilities	54,947	46,477
Total liabilities	2,738,931	2,446,892
Commitments and contingencies (Note 9)
Equity:
Member's equity	1,231,236	933,164
Retained earnings	921,013	853,527
Accumulated other comprehensive loss	(13,994)	(14,538)
Total equity	2,138,255	1,772,153
Total liabilities and equity	$ 4,877,186	$ 4,219,045