Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Data (Unaudited) [Abstract]

Quarterly Financial Information

($ in thousands, except per share amounts)
2013	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total Year
Revenue	$	1,205,396	$	1,190,533	$	1,185,278	$	1,180,369	$	4,761,576
Operating income		250,824		266,156		206,172		257,569		980,721
Net income (loss) attributable to common
shareholders of Frontier		48,140		(38,460)		35,400		67,755		112,835
Basic net income (loss) per common share
attributable to common shareholders
of Frontier	$	0.05	$	(0.04)	$	0.04	$	0.07	$	0.11

2012	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total Year
Revenue	$	1,268,054	$	1,258,777	$	1,252,469	$	1,232,553	$	5,011,853
Operating income		208,458		267,784		275,196		235,730		987,168
Net income attributable to common
shareholders of Frontier		26,768		17,989		67,000		24,879		136,636
Basic net income per common share
attributable to common shareholders
of Frontier	$	0.03	$	0.02	$	0.07	$	0.02	$	0.14