Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 69,436	$ 32,200	$ 6,983
Other comprehensive income (loss):
Reclassification adjustment for losses included in net income (Pension termination)	2,519	0	0
Net gain (loss) arising during the period	0	(2,570)	2,143
Reclassification adjustment for losses included in net income (Interest expense)	115	0	0
Losses on settlement of swaps arising during the period	(1,684)	0	0
Other comprehensive income (loss)	950	(2,570)	2,143
COMPREHENSIVE INCOME	70,386	29,630	9,126
Less: Comprehensive income attributable to noncontrolling interests		(313)	(37)
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 70,386	$ 29,317	$ 9,089