CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock Issued	Common Stock Treasury	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balances at Dec. 31, 2013	$ 597,555	$ 140,248	$ (746,237)	$ 159,025	$ 1,372,041	$ (370,615)	$ 43,093
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(985)				(2,401)		1,416
Cash dividends declared:
Common @ $0.41 per share	(33,174)				(33,174)
Noncontrolling interests	(1,719)						(1,719)
Other comprehensive income, net of deferred income taxes of $1,397 and $133 in 2015 and 2014, respectively	560					974	(414)
Contributions from noncontrolling interests	1,560						1,560
Noncontrolling interests transferred in the Infrastructure Transaction	(905)						(905)
Vesting of restricted stock units and other, net 30,705 shares and 124,532 shares in 2015 and 2014, respectively	1,427	187	(693)	1,933
Amortization of unearned portion of stock-based compensation, net of forfeitures	2,321			2,321
Balances at Jun. 30, 2014	566,640	140,435	(746,930)	163,279	1,336,466	(369,641)	43,031
Balances at Dec. 31, 2014	351,910	140,444	(749,815)	165,666	1,283,549	(532,256)	44,322
Increase (Decrease) in Stockholders' Equity
Net income (loss)	23,591				21,839		1,752
Cash dividends declared:
Common @ $0.41 per share	(32,797)				(32,797)
Noncontrolling interests	(1,559)						(1,559)
Other comprehensive income, net of deferred income taxes of $1,397 and $133 in 2015 and 2014, respectively	(23,724)					(22,619)	(1,105)
Contributions from noncontrolling interests	2,100						2,100
Sale of investment in consolidated subsidiary	200						200
Vesting of restricted stock units and other, net 30,705 shares and 124,532 shares in 2015 and 2014, respectively	(298)	58	(259)	(97)
Treasury shares repurchased, 596,632 shares	(10,220)		(10,220)
Amortization of unearned portion of stock-based compensation, net of forfeitures	2,255			2,255
Balances at Jun. 30, 2015	$ 311,458	$ 140,502	$ (760,294)	$ 167,824	$ 1,272,591	$ (554,875)	$ 45,710