CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at the beginning of the period at Dec. 31, 2015	$ 398	$ 2,847,823	$ (480,215)	$ (7,889)		$ 3,772	$ 2,363,889
Balance at the beginning of the period, shares at Dec. 31, 2015	39,714,838
Increase (Decrease) in Stockholders' Equity
Net income			158,708			23	158,731
Preferred dividend payment on behalf of subsidiary						(23)	(23)
Interest rate swaps, net of tax				(14,876)			(14,876)	[1]
Pension adjustment, net of tax				(890)			(890)
Capitalized swap interest, net of tax benefit				(163)			(163)	[2]
Stock plan activity		8,512					8,512
Stock plan activity, shares	136,198
Treasury stock activity					$ (1,295)		(1,295)
Treasury stock activity, shares					(12,061)
Balance at the end of the period at Sep. 30, 2016	$ 398	2,856,335	(321,507)	(23,818)	$ (1,295)	3,772	2,513,885
Balance at the end of the period, shares at Sep. 30, 2016	39,851,036				(12,061)
Balance at the beginning of the period at Dec. 31, 2016	$ 398	2,853,269	(277,912)	(6,786)	$ (1,231)	3,772	2,571,510
Balance at the beginning of the period, shares at Dec. 31, 2016	39,802,064				(12,061)
Increase (Decrease) in Stockholders' Equity
Net income			19,283			12	19,295
Preferred dividend payment on behalf of subsidiary						(12)	(12)
Interest rate swaps, net of tax				(2,070)			(2,070)	[1]
Capitalized swap interest, net of tax benefit				(161)			(161)	[2]
Issuance of management warrants		50,000					50,000
Stock plan activity	$ 4	16,735			$ (532)		16,207
Stock plan activity, shares	368,415				(4,321)
Exercise of warrants	$ 31	375,582					375,613
Exercise of warrants (in shares)	3,052,453
Balance at the end of the period at Sep. 30, 2017	$ 433	$ 3,295,586	$ (258,629)	$ (9,017)	$ (1,763)	$ 3,772	$ 3,030,382
Balance at the end of the period, shares at Sep. 30, 2017	43,222,932				(16,382)

[1] Net of deferred tax expense of $0.1 million and $0.2 million for the three months ended September 30, 2017 and 2016, respectively. Amount is net of deferred benefit of $1.3 million and $8.1 million for the nine months ended September 30, 2017 and 2016, respectively.

[2] The deferred tax impact was immaterial for the three months ended September 30, 2017 and 2016, respectively. Amount is net of deferred tax benefit of $0.1 million for the nine months ended September 30, 2017 and 2016, respectively.