Earnings per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended											12 Months Ended
	Jun. 30, 2013		Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012		Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Basic EPS:
Net income	$ 7,367	[1]	$ 6,521	$ 5,436	[2]	$ 4,684	$ 1,786	[1]	$ 4,862	$ 7,031	$ 3,509	$ 24,008	$ 17,188	$ 18,982
Weighted average shares outstanding												25,962	25,921	26,406
Basic EPS	$ 0.28	[1]	$ 0.25	$ 0.21	[2]	$ 0.18	$ 0.07	[1]	$ 0.19	$ 0.27	$ 0.13	$ 0.92	$ 0.66	$ 0.72
Diluted EPS:
Weighted average shares outstanding												25,962	25,921	26,406
Dilutive stock options												81	79	93
Dilutive nonvested deferred shares												315	298	187
Diluted weighted average shares												26,358	26,298	26,686
Diluted EPS	$ 0.28	[1]	$ 0.25	$ 0.21	[2]	$ 0.18	$ 0.07	[1]	$ 0.19	$ 0.27	$ 0.13	$ 0.91	$ 0.65	$ 0.71

[1] The fourth quarter of fiscal 2013 includes a pretax charge on a Canadian project of $0.6 million. The fourth quarter of fiscal 2012 included an income tax charge of $3.1 million. The income tax charge represents adjustments of $2.1 million for prior fiscal years and $1.0 million in fiscal 2012, of which $0.2 million related to fourth quarter activity.

[2] The second quarter of fiscal 2013 includes a pretax charge on a Canadian project of $3.3 million