CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME UNAUDITED - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) income		$ (5,879)	$ 3,120	$ (4,045)	$ 8,779
Other comprehensive income (loss):
Interest rate swaps	[1]	5,353	(2,683)	13,398	(2,250)
Capitalized swap interest expense	[2]	49	(46)	59	(121)
Pension adjustment	[3]	(2,010)	0	(2,010)	0
Adoption of ASU 2018-02	[4]	0	0	(1,148)	0
Adoption of ASU 2017-12	[5]	0	0	(739)	0
Terminated swap amortization		(80)	0	(80)	0
Other comprehensive income (loss)		3,312	(2,729)	9,480	(2,371)
Comprehensive (loss) income		(2,567)	391	5,435	6,408
Comprehensive loss attributable to noncontrolling interests		791	0	431	0
Comprehensive (loss) income attributable to common stockholders		(1,776)	391	5,866	6,408
Interest rate swaps, deferred tax expense		1,800	$ 1,500	3,900	1,200
Capitalized swap interest income, deferred tax benefit					$ 100
Pension deferred tax benefit		$ 600		$ 641

[1] Amounts are shown net of deferred tax expense of $1.8 million and $1.5 million for the three months ended June 30, 2018 and 2017, respectively, and $3.9 million and $1.2 million for the six months ended June 30, 2018 and 2017, respectively.

[2] The deferred tax impact was not meaningful for the three months ended June 30, 2018 and 2017 and for the six months ended June 30, 2018. Amount is net of deferred tax benefit of $0.1 million for the six months ended June 30, 2017.

[3] Net of deferred tax benefit of $0.6 million, for the three and six months ended June 30, 2018

[4] The Company adopted Accounting Standards Update ("ASU") 2018-02, Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, as of January 1, 2018. See Note 2 - Accounting Policies and Pronouncements for further discussion.

[5] The Company adopted ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, as of January 1, 2018. See Note 2 - Accounting Policies and Pronouncements for further discussion.