Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total revenues	$ 1,458,977	$ 1,102,593	$ 3,863,914	$ 3,735,702
Interest expense	28,837	25,612	74,614	76,762
Net revenues	1,150,846	857,223	2,957,440	3,020,610
Expenses:
Compensation and benefits	461,265	493,471	1,429,439	1,468,373
Cost of sales	84,876	71,596	257,501	210,834
Floor brokerage and clearing fees	44,570	42,852	131,792	133,145
Depreciation and amortization	32,295	28,760	92,360	82,129
Selling, general and other expenses	245,178	199,441	708,084	552,155
Total expenses	897,021	861,732	2,693,790	2,523,398
Income (loss) from continuing operations before income taxes and income (loss) related to associated companies	253,825	(4,509)	263,650	497,212
Income (loss) related to associated companies	18,867	30,057	84,320	(84,413)
Income from continuing operations before income taxes	272,692	25,548	347,970	412,799
Income tax provision	90,391	9,770	51,560	127,198
Income from continuing operations	182,301	15,778	296,410	285,601
Income from discontinued operations, net of income tax provision of $0, $53,490, $47,045 and $90,856	0	120,989	130,063	219,151
Gain on disposal of discontinued operations, net of income tax provision of $0, $0, $229,553 and $0	0	0	643,921	0
Net income	182,301	136,767	1,070,394	504,752
Net (income) loss attributable to the noncontrolling interests	12,000	(28)	13,208	1,941
Net income attributable to the redeemable noncontrolling interests	(390)	(36,216)	(37,294)	(64,538)
Preferred stock dividends	(1,276)	(1,172)	(3,619)	(3,203)
Net income attributable to Jefferies Financial Group Inc. common shareholders	$ 192,635	$ 99,351	$ 1,042,689	$ 438,952
Basic earnings per common share attributable to Jefferies Financial Group Inc. common shareholders:
Income from continuing operations (in dollars per share)	$ 0.56	$ 0.04	$ 0.86	$ 0.77
Income from discontinued operations (in dollars per share)	0.00	0.23	0.26	0.42
Gain on disposal of discontinued operations (in dollars per share)	0.00	0.00	1.82	0.00
Net income (in dollars per share)	0.56	0.27	2.94	1.19
Diluted earnings per common share attributable to Jefferies Financial Group Inc. common shareholders:
Income from continuing operations (in dollars per share)	0.55	0.04	0.85	0.76
Income from discontinued operations (in dollars per share)	0.00	0.23	0.26	0.41
Gain on disposal of discontinued operations (in dollars per share)	0.00	0.00	1.80	0.00
Net income (in dollars per share)	0.55	0.27	2.91	1.17
Dividends per common share (in dollars per share)	$ 0.125	$ 0.10	$ 0.325	$ 0.225
Amounts attributable to Jefferies Financial Group Inc. common shareholders:
Income from continuing operations, net of taxes	$ 192,635	$ 14,992	$ 305,846	$ 284,889
Income from discontinued operations, net of taxes	0	84,359	92,922	154,063
Gain on disposal of discontinued operations, net of taxes	0	0	643,921	0
Net income attributable to Jefferies Financial Group Inc. common shareholders	192,635	99,351	1,042,689	438,952
Commissions and other fees
Revenues:
Total revenues	155,417	139,082	461,023	437,547
Principal transactions
Revenues:
Total revenues	116,204	84,143	315,622	725,780
Investment banking
Revenues:
Total revenues	460,043	475,702	1,400,331	1,235,586
Interest income
Revenues:
Total revenues	336,736	253,916	939,272	726,972
Manufacturing revenues
Revenues:
Total revenues	94,029	81,939	307,129	243,482
Other
Revenues:
Total revenues	296,548	67,811	440,537	366,335
Jefferies Group
Revenues:
Interest expense	$ 308,131	$ 245,370	$ 906,474	$ 715,092