Dividend (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended		3 Months Ended
	Feb. 06, 2014	Dec. 16, 2013	Dec. 31, 2013	Dec. 31, 2012
Common stock dividend
Cash dividend (in dollars per share)		$ 0.22
Dividend paid (in dollars)			$ 2,720	$ 2,710
Cash dividend declared (in dollars per share)	$ 0.22		$ 0.22	$ 0.22