Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Schedule of earnings (loss) per share, basic and diluted

The following is a reconciliation of the calculation of basic and diluted earnings per share (in thousands, except share and per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Numerator:
Net income	$	24,464	$	43,808	$	59,928	$	99,762
Denominator:
Weighted-average number of common shares outstanding—basic	200,852,072		195,796,772		200,776,641		195,733,185
Effect of dilutive securities:
Unvested restricted common stock	99,873		215,834		130,349		193,477
Unexercised stock appreciation rights	—		7,512		1,387		—
Shares related to unvested PSUs	215,714		414,655		215,714		414,655
Weighted-average number of common shares outstanding—diluted	201,167,659		196,434,773		201,124,091		196,341,317
Earnings per share:
Basic earnings per share	$	0.12	$	0.22	$	0.30	$	0.51
Diluted earnings per share	$	0.12	$	0.22	$	0.30	$	0.51