Income Taxes (Tables)

6 Months Ended

Jun. 30, 2015

Income Taxes [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

		Six months ended June 30,						Three months ended June 30,
		2015			2014			2015			2014
Statutory tax rate			35.0	%		35.0	%		35.0	%		35.0	%
Federal tax at statutory rate		$	92,885		$	102,415		$	40,095		$	48,175
Nontaxable municipal bond interest and dividend received
	deduction		(16,641)			(17,783)			(6,889)			(8,856)
State income taxes, net of federal tax benefit			1,439			1,650			722			816
Foreign income taxes			15,962			15,866			6,011			8,640
Foreign tax credit			(15,628)			(15,866)			(5,852)			(8,640)
Indefinitely reinvested earnings of foreign subsidiaries			(9,134)			-			-			-
Uncertain tax positions (net of federal tax benefit on state
	positions: $71 in 2015 and $183 in 2014)		2,178			452			(56)			132
Other, net			990			835			109			241
	Income tax expense	$	72,051		$	87,569		$	34,140		$	40,508
Effective tax rate			27.1	%		29.9	%		29.8	%		29.4	%