Fair Value Of Financial Instruments (Quantitative Information related To The Significant Unobservable Inputs Utilized In Company's Level 3 Recurring Fair Value Measurements) (Details)	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2013 State And Municipal Securities [Member]	Sep. 30, 2013 Auction Rate Equity Securities [Member]	Mar. 31, 2013 Auction Rate Equity Securities [Member]	Mar. 31, 2013 Auction Rate Municipal Securities [Member]	Mar. 31, 2013 Discounted Cash Flow [Member] State And Municipal Securities [Member]	Sep. 30, 2013 Discounted Cash Flow [Member] State And Municipal Securities [Member]	Mar. 31, 2013 Discounted Cash Flow [Member] Auction Rate Equity Securities [Member]	Sep. 30, 2013 Discounted Cash Flow [Member] Auction Rate Equity Securities [Member]	Mar. 31, 2013 Discounted Cash Flow [Member] Auction Rate Municipal Securities [Member]	Sep. 30, 2013 Discounted Cash Flow [Member] Auction Rate Municipal Securities [Member]	Mar. 31, 2013 Minimum [Member] Investments In Partnerships [Member]	Mar. 31, 2013 Minimum [Member] Private Equity Investments [Member]	Jun. 30, 2013 Weighted Average [Member] Market Approach [Member] Investments In Partnerships [Member]	Jun. 30, 2013 Weighted Average [Member] Market Approach [Member] Private Equity Investments [Member]
Discount rate range, low end	5.60%		2.30%	0.10%
Discount rate range, high end	11.00%		12.70%	11.00%
Discount rate, weighted average					7.50%		7.40%		6.50%
Workout period range, low end	1 year	1 year		1 year
Workout period range, high end	4 years	3 years		4 years
Weighted average workout period						3 years 4 months 24 days		2 years 7 months 6 days		2 years 7 months 6 days
Revenue multiple											1.7	0.5	2.6	1.8
EBITDA multiple											4.5	4.3	7.7	7.8