Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements OF Comprehensive Income [Abstract]
Net income	$ 39,274	$ 50,783
Other comprehensive income, net of tax (see Note 13)	3,039	6,746
Comprehensive income	42,313	57,529
Less: Income attributable to the noncontrolling interest in a partnership		(2,643)
Comprehensive income attributable to the common shareholders of Frontier	$ 42,313	$ 54,886