Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ 4.6	$ (21.6)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization, net	6.1	7.4
Share-based compensation	2.8	2.2
Net realized gains on investments	(23.6)	(7.8)
Changes in operating assets and liabilities:
Deferred policy acquisition benefits	4.8	(2.7)
Accrued investment income and other assets	0.1	(0.4)
Postretirement and pension benefits	(6.0)	(3.8)
Other liabilities and due to/from affiliates, net	(32.5)	(27.8)
Reinsurance recoverable on losses and loss expenses payable and prepaid reinsurance premiums	1.0	0.7
Losses and loss expenses payable	52.0	90.2
Unearned premiums	9.6	7.4
Excess Tax Benefit from Share-based Compensation, Operating Activities	1.3	(0.3)
Federal income taxes	1.2	1.0
Net cash provided by operating activities	21.4	44.5
Cash flows from investing activities:
Purchases of fixed maturities available-for-sale	(244.5)	(292.0)
Purchases of equity securities available-for-sale	(69.0)	(45.0)
Purchases of other invested assets	(0.7)	(0.7)
Maturities, calls and pay downs of fixed maturities available-for-sale	94.5	101.2
Sales of fixed maturities available-for-sale	108.2	126.4
Sales of equity securities available-for-sale	91.9	65.0
Sales of other invested assets available-for-sale	0.5	0.4
Net cash used in investing activities	(19.1)	(44.7)
Cash flows from financing activities:
Proceeds from issuance of common stock	4.1	3.3
Payments to acquire treasury stock	(0.2)	(0.2)
Payment of dividends	(8.5)	(8.3)
Excess Tax Benefit from Share-based Compensation, Financing Activities	0.0	0.3
Net cash used in financing activities	(4.6)	(4.9)
Net decrease in cash and cash equivalents	(2.3)	(5.1)
Cash and cash equivalents at beginning of period	51.1	58.1
Cash and cash equivalents at end of period	48.8	53.0
Supplemental disclosures:
Interest paid (affiliates $0.4 and $0.4, respectively)	$ 2.8	$ 2.6