CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock Issued	Common Stock Treasury	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balances at Dec. 31, 2012	$ 861,624	$ 140,080	$ (745,205)	$ 152,645	$ 1,675,490	$ (411,168)	$ 49,782
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(195,118)				(202,613)		7,495
Cash dividends declared:
Common @ $0.615 per share	(49,668)				(49,668)
Noncontrolling interests	(2,880)						(2,880)
Other comprehensive income, net of deferred income taxes of $2,939 and $(2,631) in 2014 and 2013, respectively	(18,429)					(18,497)	68
Contributions from noncontrolling interests	4,622						4,622
Purchase of subsidiary shares from noncontrolling interest	185			292			107
Stock options exercised, 20,000 shares in 2013	400	25		375
Vesting of restricted stock units and other, net 130,603 shares and 62,039 shares in 2014 and 2013, respectively	1,335	119	(841)	2,057
Amortization of unearned portion of stock-based compensation, net of forfeitures	3,632			3,632
Balances at Sep. 30, 2013	605,333	140,224	(746,046)	158,417	1,423,209	(429,665)	59,194
Balances at Dec. 31, 2013	606,835	140,248	(746,237)	159,025	1,381,321	(370,615)	43,093
Increase (Decrease) in Stockholders' Equity
Net income (loss)	23,747				20,799		2,948
Cash dividends declared:
Common @ $0.615 per share	(49,763)				(49,763)
Noncontrolling interests	(2,319)						(2,319)
Other comprehensive income, net of deferred income taxes of $2,939 and $(2,631) in 2014 and 2013, respectively	(1,061)					8	(1,069)
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 130,603 shares and 62,039 shares in 2014 and 2013, respectively	1,550	195	(712)	2,067
Amortization of unearned portion of stock-based compensation, net of forfeitures	3,881			3,881
Balances at Sep. 30, 2014	$ 583,525	$ 140,443	$ (746,949)	$ 164,973	$ 1,352,357	$ (370,607)	$ 43,308