CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 1,696,000	$ 1,341,000
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, liquidation preference (in dollars)		$ 295,500,000
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	429,401,611	408,629,444
Common stock, shares outstanding	429,401,611	408,629,444