Dividends And Stock Repurchase Program (Narrative) (Details) (USD $)	0 Months Ended			9 Months Ended	0 Months Ended	9 Months Ended	0 Months Ended	9 Months Ended	6 Months Ended	9 Months Ended
	Nov. 02, 2011	Dec. 31, 2011 Authorized On May 20, 2011 [Member]	Dec. 31, 2011 Seventh Authorized Repurchase Program [Member]	Mar. 31, 2012 Sixth Repurchase Program [Member]	May 20, 2011 Declared On May 20, 2011 [Member]	Mar. 31, 2012 Declared On May 20, 2011 [Member]	Nov. 02, 2011 Declared On November 2, 2011 [Member]	Mar. 31, 2012 Declared On November 2, 2011 [Member]	Dec. 31, 2011 Recorded On June 30, 2011 [Member]	Mar. 31, 2012 Recorded On June 30, 2011 [Member]
Dividends And Stock Repurchase Program [Line Items]
Dividend paid, recorded as reduction to retained earnings						$ 8,285,000		$ 10,039,000
Declaration date						May 20, 2011		Nov. 02, 2011
Stock repurchase program, expiry date		June 30, 2013	December 31, 2013
Stock repurchase program, completion date				December 2011
Authorized amount for repurchase					$ 100,000,000		$ 100,000,000
Record date	Dec. 08, 2011					Jun. 20, 2011		Dec. 08, 2011		Jun. 30, 2011
Payment date	Jan. 10, 2012					Jul. 11, 2011		Jan. 10, 2012	Jul. 11, 2011