Subsequent Events (Details) - Subsequent event - $ / shares	1 Months Ended	6 Months Ended
	Jul. 28, 2015	Jun. 30, 2015
Subsequent events:
Dividend declared (in dollars per share)	$ 1.3
Dividend declared, date		Jul. 28, 2015
Dividend payable, date		Sep. 10, 2015
Shareholders of record, date		Aug. 10, 2015