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)	36,448				31,043		5,405
Cash dividends declared:
Common @ $0.41 per share	(33,110)				(33,110)
Noncontrolling interests	(2,655)						(2,655)
Other comprehensive income, net of deferred income taxes of $130 and $3,771 in 2014 and 2013, respectively	(14,788)					(13,978)	(810)
Contributions from noncontrolling interests	4,502						4,502
Purchase of subsidiary shares from noncontrolling interest	(185)			(292)			107
Stock options exercised, 12,000 shares in 2013	387	25		362
Vesting of restricted stock units and other, net 124,532 shares and 60,674 shares in 2014 and 2013, respectively	1,336	117	(840)	2,059
Amortization of unearned portion of stock-based compensation, net of forfeitures	2,185			2,185
Balances at Jun. 30, 2013	855,744	140,222	(746,045)	156,959	1,673,423	(425,146)	56,331
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)	(1,420)				(2,836)		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 $130 and $3,771 in 2014 and 2013, 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 124,532 shares and 60,674 shares in 2014 and 2013, 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	$ 575,485	$ 140,435	$ (746,930)	$ 163,279	$ 1,345,311	$ (369,641)	$ 43,031