Consolidated Statements of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Revenue      
Diversified industrial net sales $ 629,396 $ 634,964 $ 367,124
Energy net sales 92,834 32,984 0
Financial services revenue 21,155 14,921 10,803
Investment and other income 2,347 867 4,418
Net investment gains (losses) 15,722 (4,352) 24,050
Total revenue 761,454 679,384 406,395
Costs and expenses      
Cost of goods sold 514,466 492,051 277,450
Selling, general and administrative expenses 166,841 134,002 83,607
Impairment charges 1,602 1,505 0
Finance interest expense 1,176 1,571 2,022
(Recovery of) provision for loan losses (415) 8 (420)
Interest expense 13,429 12,424 12,123
Realized and unrealized (gain) loss on derivatives (1,352) 397 5,164
Management fees - related party 7,424 8,169 7,531
Deferred fee liability to related party - increase (decrease) 11,448 (6,107) 6,268
Other income 700 (7,655) 0
Total costs and expenses 715,319 636,365 393,745
Income from continuing operations before income taxes and equity method income (loss) 46,135 43,019 12,650
Income tax provision (benefit) 17,647 (65,119) 2,522
Income from equity method investments and investments held at fair value:      
Income (Loss) of associated companies, net of taxes 14,204 (13,823) 10,305
Loss from other investments - related party (8,329) (15,743) (3,220)
Income (Loss) from investments held at fair value 18,967 (183) (411)
Net income from continuing operations 53,330 78,389 16,802
Discontinued operations:      
Income (Loss) from discontinued operations, net of taxes 3,272 1,917 (1,648)
Gain on sale of discontinued operations, net of taxes 7,163 971 31,292
Income from discontinued operations 10,435 2,888 29,644
Net income 63,765 81,277 46,446
Net income attributable to noncontrolling interests in consolidated entities:      
Continuing operations (17,977) (44,521) (248)
Discontinued operations (4,770) (1,287) (14,451)
Net (income) attributable to noncontrolling interests in consolidated entities (22,747) (45,808) (14,699)
Net income attributable to common unitholders $ 41,018 $ 35,469 $ 31,747
Net income per common unit - basic      
Net income from continuing operations (in dollars per unit) 1.19 1.34 0.66
Net income from discontinued operations (in dollars per unit) 0.19 0.07 0.60
Net income attributable to common unitholders (in dollars per unit) 1.38 1.41 1.26
Net income per common unit - diluted (in dollars per unit)      
Net income from continuing operations (in dollars per unit) 1.19 0.94 0.60
Net income from discontinued operations (in dollars per unit) 0.19 0.05 0.56
Net income attributable to common unitholders (in dollars per unit) 1.38 0.99 1.16
Weighted average number of common units outstanding - basic (in shares) 29,748,746 25,232,985 25,234,827
Weighted average number of common units outstanding - diluted (in shares) 29,774,527 29,669,582 27,482,804