Other Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2016

Postemployment Benefits [Abstract]

Schedule of shares purchased in open market for employees

Shares purchased in the open market for issuance to employees pursuant to the plan for the years ended December 31, 2014, 2015 and 2016 were as follows:

Purchase Date	Shares	Common Stock Fair Value		Purchase Price		Compensation Expense
March 31, 2014	4,961	$	35.08	$	29.82	$	26,095
June 30, 2014	5,180	$	34.38	$	29.22	$	26,729
September 30, 2014	5,246	$	26.99	$	22.94	$	21,246
December 31, 2014	3,931	$	36.87	$	31.34	$	21,738
Total/Weighted Average	19,318	$	33.06	$	28.10	$	95,808
March 31, 2015	4,322	$	29.98	$	25.49	$	19,406
June 30, 2015	5,443	$	25.72	$	21.86	$	21,010
September 30, 2015	4,939	$	23.45	$	19.93	$	17,385
December 31, 2015	6,822	$	18.61	$	15.82	$	19,033
Total/Weighted Average	21,526	$	23.80	$	20.23	$	76,834
March 31, 2016	4,617	$	20.63	$	17.54	$	14,267
June 30, 2016	3,617	$	28.10	$	23.89	$	15,228
September 30, 2016	4,991	$	19.81	$	16.84	$	14,823
December 31, 2016	3,717	$	24.80	$	21.08	$	13,827
Total/Weighted Average	16,942	$	22.90	$	19.46	$	58,145