Equity and Dividends (Tables)

6 Months Ended

Jun. 30, 2017

Equity and Dividends [Abstract]

Schedule of Quarterly Dividends Declared and Paid

	Declaration date	Dividend per share		Record date		Total dividends	Payment date
Six months ended June 30, 2017:
Fourth quarter 2016	January 23, 2017	$	0.1700	February 10, 2017	$	18,160	March 3, 2017
First quarter 2017	May 4, 2017		0.1700	May 23, 2017		18,188	June 13, 2017
Six months ended June 30, 2016:
Fourth quarter 2015	January 15, 2016	$	0.1600	February 12, 2016	$	17,154	March 4, 2016
First quarter 2016	May 9, 2016		0.1600	May 24, 2016		17,022	June 14, 2016