Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2011

Comprehensive Income

Components Of Comprehensive Income

	Three Months Ended June 30						Six Months Ended June 30
	2011			2010			2011			2010
	(In thousands)						(In thousands)
Net income attributable to Arch Coal, Inc.	$	11,079		$	66,156		$	66,680		$	64,360
Other comprehensive income, net of income taxes:
Pension, postretirement and other post-employment benefits, reclassifications into net income	293			(536		)	866			56
Unrealized losses on available-for-sale securities	(1,434		)	(925		)	(687		)	(916		)
Unrealized gains and losses on derivatives, net of reclassifications into net income:
Unrealized gains (losses) on derivatives	(3,127		)	(5,451		)	6,374			(5,089		)
Reclassifications of (gains) losses into net income	(4,360		)	(506		)	(6,484		)	1,217
Total comprehensive income	$	2,451		$	58,738		$	66,749		$	59,628