CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Other property and equipment, accumulated depreciation	$ 26,429	$ 24,263
Other assets, accumulated depreciation and amortization	$ 6,438	$ 5,911
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	48,392,552	48,076,860
Treasury stock, shares	16,582	16,582