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Equity (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Reconciliation of equity attributable to non-controlling interests        
Noncontrolling interests, beginning of period $ 4,400,000 $ 600,000 $ 596,000 $ 2,300,000
Net income (loss) attributable to noncontrolling interests, net of tax 8,626,000 0 8,398,000 0
Fair value of net assets and liabilities acquired and assigned to NCI 0 0 4,000,000 0
Distribution to noncontrolling interest (9,100,000) 0 (9,100,000) 0
Deconsolidation of noncontrolling interest 0 0 0 (1,700,000)
Noncontrolling interests, end of period $ 3,927,000 $ 600,000 $ 3,927,000 $ 600,000