Statement of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 33.5	$ 26.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	6.6	5.9
Amortization of definite-lived intangible assets	0.4	0.4
Amortization of debt discount and debt issuance costs	2.7	2.3
Deferred income taxes	15.3	16.0
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	(0.8)	(1.3)
Non-cash equity compensation	2.6	2.5
Net non-cash LIFO benefit	(3.7)	(2.9)
Non-cash unrealized losses (gains) on derivative positions	0.3	(3.6)
Amortization of option premiums paid	0	0.1
Gain on sale of available for sale securities	(0.5)	0
Non-cash net periodic pension benefit income relating to VEBAs	(5.6)	(3.0)
Other non-cash (benefit) charges	(2.4)	0.8
Changes in operating assets and liabilities:
Trade and other receivables	(23.6)	(31.3)
Inventories (excluding LIFO benefit/charge)	(9.6)	10.4
Prepaid expenses and other current assets	(2.3)	(1.9)
Accounts payable	9.9	3.3
Accrued liabilities	(19.5)	4.3
Payable to affiliate	4.4	8.0
Long-term assets and liabilities, net	(1.4)	(1.5)
Net cash provided by operating activities	6.3	35.0	[1]
Cash flows from investing activities:
Capital expenditures	(9.3)	(9.0)
Purchase of available for sale securities	(85.6)	0
Proceeds from sale of available for sale securities	85.2	0
Change in restricted cash	0	7.2
Net cash used in investing activities	(9.7)	(1.8)
Cash flows from financing activities:
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	0.8	1.3
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(2.2)	(2.1)
Repurchase of common stock	(14.7)	0
Cash dividend paid to stockholders	(5.9)	(4.9)
Net cash used in financing activities	(22.0)	(5.7)
Net (decrease) increase in cash and cash equivalents during the period	(25.4)	27.5
Cash and cash equivalents at beginning of period	273.4	49.8
Cash and cash equivalents at end of period	$ 248.0	$ 77.3

[1] The Company treats changes in long-term intercompany balances that relate to financing activities as cash flow from financing activities. In the above table, the Company has revised the previous classification of the changes in such intercompany balances during the quarter ended March 31, 2012 from cash flows from operating activities to a separate line item in cash flows from financing activities captioned "intercompany loan”.