Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2020	18,503,805
Balance at Dec. 31, 2020	$ 6.9	$ 54.7	$ 363.3	$ (20.1)	$ 404.8	$ 1.3	$ 406.1
Net income (loss)	0.0	0.0	25.7	0.0	25.7	0.0	25.7
Other comprehensive income (loss)	$ 0.0	0.0	0.0	(10.7)	(10.7)	0.0	(10.7)
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of 24,025 shares (in shares)	102,681
Share-based compensation	$ 0.0	3.1	0.0	0.0	3.1	0.0	3.1
Dividends paid per common share	0.0	0.0	(4.2)	0.0	(4.2)	0.0	(4.2)
Issue Stock for Directors, Employee Benefit and Stock Plans, net of related tax withholdings	$ 0.1	1.3	0.0	0.0	1.4	0.0	1.4
Balance (in shares) at Mar. 31, 2021	18,606,486
Balance at Mar. 31, 2021	$ 7.0	59.1	384.8	(30.8)	420.1	1.3	$ 421.4
Balance (in shares) at Dec. 31, 2021	18,535,116						18,535,116
Balance at Dec. 31, 2021	$ 7.0	54.1	410.6	(37.9)	433.8	1.3	$ 435.1
Net income (loss)	0.0	0.0	10.3	0.0	10.3	0.0	10.3
Other comprehensive income (loss)	$ 0.0	0.0	0.0	(4.0)	(4.0)	0.0	(4.0)
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of 24,025 shares (in shares)	44,700
Issue stock for directors, employee benefit and stock plans, net of related tax withholdings and repurchases of 24,025 shares	$ 0.0	(1.2)	0.0	0.0	(1.2)	0.0	(1.2)
Share-based compensation	0.0	1.8	0.0	0.0	1.8	0.0	1.8
Dividends paid per common share	0.0	0.0	(4.6)	0.0	(4.6)	0.0	(4.6)
Other	$ 0.0	(0.1)	0.0	0.0	(0.1)	0.0	$ (0.1)
Balance (in shares) at Mar. 31, 2022	18,579,816						18,579,816
Balance at Mar. 31, 2022	$ 7.0	$ 54.6	$ 416.3	$ (41.9)	$ 436.0	$ 1.3	$ 437.3