Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 268.1	$ 231.3
Cash, securities and other assets segregated under federal and other regulations (including $515.5 and $15.3 at fair value at September 30, 2015 and September 30, 2014 respectively)	756.9	448.0
Securities purchased under agreements to resell	325.3	0.0
Deposits with and receivables from:
Exchange-clearing organizations (including $1,009.4 and $1,255.4 at fair value at September 30, 2015 and September 30, 2014, respectively)	1,533.5	1,731.4
Broker-dealers, clearing organizations and counterparties (including $(52.9) and $(1.1) at fair value at September 30, 2015 and September 30, 2014, respectively)	277.6	123.0
Receivables from customers, net	217.3	55.6
Notes receivable, net	78.4	65.2
Income taxes receivable	10.6	10.8
Financial instruments owned, at fair value (includes securities pledged as collateral that can be sold or repledged of $170.7)	1,421.9	197.9
Physical commodities inventory (including precious metals of $15.2 at fair value at September 30, 2015)	32.8	40.0
Deferred income taxes, net	28.2	32.0
Property and equipment, net	19.7	15.9
Goodwill and intangible assets, net	58.1	58.0
Other assets	41.6	30.6
Total assets	5,070.0	3,039.7
Liabilities:
Accounts payable and other accrued liabilities (including $3.3 and $5.5 at fair value at September 30, 2015 and September 30, 2014)	144.8	114.1
Payable to:
Customers	2,593.5	2,228.7
Broker-dealers, clearing organizations and counterparties (including $1.6 at fair value at September 30, 2015)	262.9	11.9
Payables to lenders under loans	41.6	22.5
Senior unsecured notes	45.5	45.5
Income taxes payable	9.0	7.6
Securities sold under agreements to repurchase	1,007.3	0.0
Financial instruments sold, not yet purchased, at fair value	568.3	264.0
Total liabilities	$ 4,672.9	$ 2,694.3
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $0.01 par value. Authorized 1,000,000 shares; no shares issued or outstanding	$ 0.0	$ 0.0
Common stock, $0.01 par value. Authorized 30,000,000 shares; 20,184,556 issued and 18,812,803 outstanding at September 30, 2015 and 19,826,635 issued and 18,883,662 outstanding at September 30, 2014	0.2	0.2
Common stock in treasury, at cost - 1,371,753 shares at September 30, 2015 and 942,973 shares at September 30, 2014	(26.8)	(17.5)
Additional paid-in capital	240.8	229.6
Retained earnings	200.4	144.7
Accumulated other comprehensive loss, net	(17.5)	(11.6)
Total stockholders' equity	397.1	345.4
Total liabilities and stockholders' equity	$ 5,070.0	$ 3,039.7

Amount combines the carrying amounts for goodwill and finite- and indefinite-lived intangible assets. Goodwill represents the carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquire, adjusted for any amortization recognized prior to adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. Indefinite-lived intangible assets represent the carrying amount of intangible assets, excluding goodwill, which have a projected indefinite period of benefit (hence are not amortized), allocated to the reportable segment. These assets, acquired either individually or as part of a group of assets, in either an asset acquisition or business combination, are assessed at least annually for impairment. Examples may include trade secrets, contractual rights, trade names, and licensing agreements. Finite-lived intangible assets are the aggregate sum of gross carrying value of a major finite-lived intangible asset class, less accumulated amortization and any impairment charges. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

No definition available.