Comprehensive Income

9 Months Ended

Sep. 30, 2011

Comprehensive Income [Abstract]

Comprehensive Income

14. Comprehensive Income

     Comprehensive income consists of net income and other comprehensive income. Other comprehensive income items are transactions recorded in stockholders' equity during the year, excluding net income and transactions with stockholders.

The following table presents the components of comprehensive income:

		Three Months Ended September 30					Nine Months Ended September 30
	2011			2010		2011			2010
	(In thousands)					(In thousands)
Net income attributable to Arch Coal, Inc.	$	19,056		$	46,678	$	82,128		$	111,038
Other comprehensive income, net of income taxes:
Pension, postretirement and other post-employment benefits,
reclassifications into net income		388			28		1,254			84
Unrealized gains (losses) on available-for-sale securities		(569	)		738		(1,256	)		(178	)
Unrealized gains and losses on derivatives, net of
reclassifications into net income:
Unrealized gains (losses) on derivatives		(3,671	)		1,200		2,703			(3,889	)
Reclassifications of (gains) losses into net income		(3,575	)		639		(10,059	)		1,856
Total comprehensive income	$	11,629		$	49,283	$	74,770		$	108,911