Noncontrolling Interests (Tables)

6 Months Ended

Jun. 30, 2013

Noncontrolling Interests

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

	Three months ended June 30,		Six months ended June 30,
	2013	2012	2013	2012
Revenues	15,631	3,793	31,903	5,414
Net income attributable to noncontrolling interests	329	124	599	168

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

	June 30, 2013		December 31, 2012
Cash	$	4,442	$	3,565
Accounts receivable	11,464		8,843
Current liabilities	11,680		9,379