Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (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, 2011			$ 62	$ 373,384	$ 840,644	$ 251,980	$ (410,717)
Options exercised, 2013, 563,487 shares; 2012, 190,897 shares			0
Conversion of common stock units, 2013, 11,851 shares; 2012, 10,696 shares			0
Conversion of restricted stock units, 2013, 141,732 shares; 2012, 85,641 shares			0
Options exercised and conversion of common stock units and restricted stock units				3,773
Share-based compensation expense				860
Net income	39,774				39,774
Cash dividends, 2013, $0.39 per share; 2012, $0.26 per share					(10,689)
Change in net unrealized gains and losses on fixed maturities and equity securities	66,422					66,422
Change in net funded status of pension and other postretirement benefit obligations	0					0
Acquisition of shares, 2013, 173,428 shares; 2012, 705,057 shares							(11,955)
Ending balance at Jun. 30, 2012	1,143,538		62	378,017	869,729	318,402	(422,672)
Beginning balance at Dec. 31, 2012	1,245,803		62	383,135	921,969	367,089	(426,452)
Options exercised, 2013, 563,487 shares; 2012, 190,897 shares			1
Conversion of common stock units, 2013, 11,851 shares; 2012, 10,696 shares			0
Conversion of restricted stock units, 2013, 141,732 shares; 2012, 85,641 shares			0
Options exercised and conversion of common stock units and restricted stock units				12,413
Share-based compensation expense				710
Net income	53,007				53,007
Cash dividends, 2013, $0.39 per share; 2012, $0.26 per share					(16,160)
Change in net unrealized gains and losses on fixed maturities and equity securities	(185,553)	[1],[2]				(185,553)
Change in net funded status of pension and other postretirement benefit obligations	0					0
Acquisition of shares, 2013, 173,428 shares; 2012, 705,057 shares							(3,884)
Ending balance at Jun. 30, 2013	$ 1,106,337		$ 63	$ 396,258	$ 958,816	$ 181,536	$ (430,336)

[1] All amounts are net of tax.

[2] The pretax amounts reclassified from accumulated other comprehensive income, $15,417 and $22,279, are included in net realized investment gains and the related tax expenses, $5,396 and $7,798, are included in income tax expense in the Consolidated Statements of Operations for the three and six months ended June 30, 2013, respectively.