Noncontrolling Interests (Tables)

9 Months Ended

Sep. 30, 2013

Noncontrolling Interests

Schedule of the Blythe joint venture operating activities included in the Company's consolidated statements of income

	Three months ended September 30,		Nine months ended September 30,
	2013	2012	2013	2012
Revenues	15,468	7,750	47,371	13,164
Net income attributable to noncontrolling interests	1,348	432	1,947	600

Schedule of the carrying value of the assets and liabilities associated with the operations of the Blythe joint venture included in the Company's consolidated balance sheets

	September 30, 2013		December 31, 2012
Cash	$	1,793	$	3,565
Accounts receivable	8,448		8,843
Current liabilities	8,318		9,379