CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total		Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss), net of taxes	Treasury stock, at cost
Beginning balance at Dec. 31, 2015			$ 65	$ 442,648	$ 1,116,277	$ 163,373	$ (457,702)
Options exercised, 2017, 33,764 shares; 2016, 84,850 shares			0
Conversion of common stock units,2017, 15,981 shares; 2016, 8,538 shares			0
Conversion of restricted stock units,2017, 247,620 shares; 2016, 165,794 shares			0
Options exercised and conversion of common stock units and restricted stock units				353
Share-based compensation expense				1,910
Net income	$ 25,153				25,153
Cash dividends, 2017, $0.275 per share;2016, $0.265 per share					(11,114)
Change in net unrealized investment gains and losses on fixed maturity and equity securities	69,490	[1],[2]				69,490
Change in net funded status of benefit plans	0	[1]				0
Acquisition of shares, 2017, 0 shares;2016, 474,277 shares							(14,466)
Ending balance at Mar. 31, 2016	1,335,987		65	444,911	1,130,316	232,863	(472,168)
Beginning balance at Dec. 31, 2016	1,293,982		65	453,479	1,155,732	163,921	(479,215)
Options exercised, 2017, 33,764 shares; 2016, 84,850 shares			0
Conversion of common stock units,2017, 15,981 shares; 2016, 8,538 shares			0
Conversion of restricted stock units,2017, 247,620 shares; 2016, 165,794 shares			0
Options exercised and conversion of common stock units and restricted stock units				(750)
Share-based compensation expense				2,253
Net income	15,318				15,318
Cash dividends, 2017, $0.275 per share;2016, $0.265 per share					(11,518)
Change in net unrealized investment gains and losses on fixed maturity and equity securities	22,533	[1],[2]				22,533
Change in net funded status of benefit plans	0	[1]				0
Acquisition of shares, 2017, 0 shares;2016, 474,277 shares							0
Ending balance at Mar. 31, 2017	$ 1,321,818		$ 65	$ 454,982	$ 1,159,532	$ 186,454	$ (479,215)

[1] All amounts are net of tax.

[2] The pretax amounts reclassified from accumulated other comprehensive income (loss), $(313) and $740, are included in net realized investment gains and losses and the related income tax expenses, $(110) and $259, are included in income tax expense in the Consolidated Statements of Operations for the three months ended March 31, 2017 and 2016, respectively.