Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data (Unaudited) [Abstract]

Quarterly Financial Information

($ in thousands, except per share amounts)
2011	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total Year
Revenue	$	1,346,697	$	1,322,255	$	1,290,939	$	1,283,152	$	5,243,043
Operating income		250,593		238,280		180,291		230,457		899,621
Net income attributable to common shareholders of  Frontier		54,711		32,261		20,395		42,247		149,614
Basic and diluted net income per common share
attributable to common shareholders of Frontier	$	0.05	$	0.03	$	0.02	$	0.04	$	0.15
2010
Revenue	$	519,849	$	516,137	$	1,402,968	$	1,358,721	$	3,797,675
Operating income		161,862		136,411		234,045		239,680		771,998
Net income attributable to common shareholders of  Frontier		42,565		35,121		28,995		45,992		152,673
Basic and diluted net income per common share
attributable to common shareholders of Frontier	$	0.14	$	0.11	$	0.03	$	0.05	$	0.23