Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (2.1)	$ (3.3)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization, net	2.9	3.1
Share-based compensation	0.0	1.7
Net investment (loss) gain	11.7	(7.8)
Realized Investment Gains (Losses)	11.7	(7.8)
Changes in operating assets and liabilities:
Deferred policy acquisition costs	5.2	5.8
Accrued investment income and other assets	(3.8)	(0.5)
Postretirement and pension benefits	(0.3)	(2.9)
Other liabilities and due to/from affiliates, net	6.3	(14.0)
Reinsurance recoverable on losses and loss expenses payable and prepaid reinsurance premiums	1.0	(1.1)
Losses and loss expenses payable	(8.0)	35.7
Unearned premiums	(22.6)	(11.3)
Federal income taxes	(1.0)	(0.9)
Net cash (used in) provided by operating activities	(10.7)	4.5
Cash flows from investing activities:
Purchases of fixed maturities available-for-sale	(99.0)	(120.5)
Purchases of equity securities	(61.5)	(39.0)
Purchases of other invested assets	(0.5)	(0.2)
Maturities, calls and pay downs of fixed maturities available-for-sale	55.5	54.1
Sales of fixed maturities available-for-sale	15.3	50.7
Sales of equity securities	65.1	47.6
Sales of other invested assets	0.3	0.3
Net cash used in investing activities	(24.8)	(7.0)
Cash flows from financing activities:
Proceeds from issuance of common stock	9.3	1.5
Payments to acquire treasury stock	(0.1)	(0.2)
Payment of dividends	(4.3)	(4.3)
Net cash provided by (used in) financing activities	4.9	(3.0)
Net decrease in cash and cash equivalents	(30.6)	(5.5)
Cash and cash equivalents at beginning of period	91.5	51.1
Cash and cash equivalents at end of period	60.9	45.6
Supplemental disclosures:
Interest paid (affiliates $0.2 and $0.2, respectively)	$ 1.6	$ 1.4