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, 2014			$ 64	$ 422,232	$ 1,065,318	$ 284,601	$ (435,752)
Options exercised, 2016, 84,850 shares; 2015, 43,298 shares			0
Conversion of common stock units, 2016, 8,538 shares; 2015, 8,293 shares			0
Conversion of restricted stock units, 2016, 165,794 shares; 2015, 157,539 shares			0
Options exercised and conversion of common stock units and restricted stock units				10,882
Share-based compensation expense				1,965
Net income	$ 34,275				34,275
Cash dividends, 2016, $0.265 per share; 2015, $0.250 per share					(10,676)
Change in net unrealized gains and losses on fixed maturities and equity securities	37,578	[1],[2]				37,578
Change in net funded status of pension obligations	0	[1]				0
Acquisition of shares, 2016, 474,277 shares; 2015, 23,500 shares							(716)
Ending balance at Mar. 31, 2015	1,409,771		64	435,079	1,088,917	322,179	(436,468)
Beginning balance at Dec. 31, 2015	1,264,661		65	442,648	1,116,277	163,373	(457,702)
Options exercised, 2016, 84,850 shares; 2015, 43,298 shares			0
Conversion of common stock units, 2016, 8,538 shares; 2015, 8,293 shares			0
Conversion of restricted stock units, 2016, 165,794 shares; 2015, 157,539 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, 2016, $0.265 per share; 2015, $0.250 per share					(11,114)
Change in net unrealized gains and losses on fixed maturities and equity securities	69,490	[1],[2]				69,490
Change in net funded status of pension obligations	0	[1]				0
Acquisition of shares, 2016, 474,277 shares; 2015, 23,500 shares							(14,466)
Ending balance at Mar. 31, 2016	$ 1,335,987		$ 65	$ 444,911	$ 1,130,316	$ 232,863	$ (472,168)

[1] All amounts are net of tax.

[2] The pretax amounts reclassified from accumulated other comprehensive income (loss), $740 and $5,834, are included in net realized investment gains and losses and the related tax expenses, $259 and $2,042, are included in income tax expense in the Consolidated Statements of Operations for the three months ended March 31, 2016 and 2015, respectively.