Quarterly Financial Information (unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Summarized quarterly financial data for the years ended December 31, 2016 and 2015 are presented in the following table. In the following table, the sum of basic and diluted “Loss per common share” for the four quarters may differ from the annual amounts due to the required method of computing weighted average number of shares in the respective periods. Additionally, due to the effect of rounding, the sum of the individual quarterly loss per share amounts may not equal the calculated year loss per share amount (in thousands, except per share data).

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Year ended December 31, 2016
Total operating revenues	$	49,606		$	47,066		$	54,479		$	83,883
Total operating expenses		95,367			83,865			79,530			90,745
Operating loss		(45,761	)		(36,799	)		(25,051	)		(6,862	)
Net loss		(40,687	)		(73,011	)		(26,801	)		(63,307	)
Loss per common share:
Basic and diluted	$	(0.18	)	$	(0.33	)	$	(0.10	)	$	(0.23	)

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Year ended December 31, 2015
Total operating revenues	$	43,814		$	74,453		$	71,172		$	65,882
Total operating expenses		93,248			114,909			123,462			911,187
Operating loss		(49,434	)		(40,456	)		(52,290	)		(845,305	)
Net loss		(34,103	)		(41,970	)		(81,468	)		(813,869	)
Loss per common share:
Basic and diluted	$	(0.17	)	$	(0.19	)	$	(0.37	)	$	(3.66	)