Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Property, Plant and Equipment. Weighted Average Useful Lives

The weighted average useful lives combining both methods are approximately:

Land improvements	21 years
Buildings	25 years
Rides	18 years
Equipment	9 years

Schedule of Weighted Average Number of Units

For purposes of calculating the basic and diluted earnings per limited partner unit, no adjustments have been made to the reported amounts of net income (loss). The unit amounts used are as follows:

	2012		2011		2010
(In thousands except per unit amounts)
Basic weighted average units outstanding	55,518		55,345		55,316
Effect of dilutive units:
Unit options (Note 7)	43		—		—
Phantom units (Note 7)	334		541		—
Diluted weighted average units outstanding	55,895		55,886		55,316
Net income (loss) per unit - basic	$	1.82	$	1.28	$	(0.60	)
Net income (loss) per unit - diluted	$	1.81	$	1.27	$	(0.60	)