HOUSTON--(BUSINESS WIRE)--Insperity, Inc. (NYSE: NSP), a leading provider of human resources and business performance solutions for America’s best businesses, today announced that its board of directors has approved an increase in its quarterly cash dividend to $0.22 per share. The cash dividend, representing an increase of $0.03 per share over the prior quarter, will be paid on June 29, 2015 to all stockholders of record as of June 15, 2015. Insperity’s board of directors also authorized an ex