CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income		$ 88,844	$ 82,862	$ 217,365	$ 283,053
OTHER COMPREHENSIVE INCOME/(LOSS):
OTHER COMPREHENSIVE INCOME		127	726	383	2,178
COMPREHENSIVE INCOME		88,971	83,588	217,748	285,231
Less: Comprehensive income attributable to noncontrolling interests		(40,410)	(27,178)	(92,827)	(101,691)
COMPREHENSIVE INCOME ATTRIBUTABLE TO AHGP		48,561	56,410	124,921	183,540
Pension Plan
OTHER COMPREHENSIVE INCOME/(LOSS):
Amortization of net actuarial (gain) loss (1)	[1]	787	839	2,365	2,516
Total recognized adjustments	[1]	787	839	2,365	2,516
Pneumoconiosis benefits
OTHER COMPREHENSIVE INCOME/(LOSS):
Amortization of net actuarial (gain) loss (1)	[1]	(660)	(113)	(1,982)	(338)
Total recognized adjustments	[1]	$ (660)	$ (113)	$ (1,982)	$ (338)

[1] Amortization of net actuarial gain or loss is included in the computation of net periodic benefit cost (see Notes 10 and 12 for additional details).