Equity and Dividends (Tables)

12 Months Ended

Dec. 31, 2015

Equity and Dividends [Abstract]

Schedule of Quarterly Dividends Declared and Paid

	Declaration date	Dividend per share		Record date		Total dividends	Payment date
Year ended December 31, 2015:
Fourth quarter 2014	January 12, 2015	$	0.1400	February 13, 2015	$	15,089	March 6, 2015
First quarter 2015	May 7, 2015		0.1400	May 29, 2015		14,955	June 19, 2015
Second quarter 2015	August 6, 2015		0.1600	September 4, 2015		17,147	September 25, 2015
Third quarter 2015	November 5, 2015		0.1600	November 27, 2015		17,149	December 18, 2015
Year ended December 31, 2014:
Fourth quarter 2013	January 20, 2014	$	0.1300	February 14, 2014	$	13,915	March 7, 2014
First quarter 2014	May 2, 2014		0.1300	May 23, 2014		13,942	June 13, 2014
Second quarter 2014	August 5, 2014		0.1400	August 22, 2014		15,028	September 12, 2014
Third quarter 2014	November 4, 2014		0.1400	November 21, 2014		15,044	December 12, 2014
Year ended December 31, 2013:
Fourth quarter 2012	January 21, 2013	$	0.1225	February 15, 2013	$	13,065	March 8, 2013
First quarter 2013	April 26, 2013		0.1225	May 17, 2013		13,068	June 7, 2013
Second quarter 2013	August 1, 2013		0.1300	August 23, 2013		13,887	September 13, 2013
Third quarter 2013	November 1, 2013		0.1300	November 22, 2013		13,898	December 13, 2013