Debt And Shareholders' Equity Schedule of Subordinated Borrowing (Details) - Jun. 30, 2015 - USD ($) number in Thousands, $ in Thousands	Total
Subordinated Borrowing [Line Items]
Subordinated Debt, Current	$ 228,961
Convertible Subordinated Note, Coupon Rate 6.00% [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Interest Rate	0.00%
Convertible Subordinated Debt, Current	$ 76,523
Subordinated Notes, Coupon Rate 6.00% [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Interest Rate	0.00%
Subordinated Debt, Current	$ 32,520
Convertible Subordinated Notes, Coupn Rate 5.50% [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Interest Rate	0.00%
Convertible Subordinated Debt, Current	$ 67,441
Subordinated Notes, Coupon Rate 5.50% [Member] [Member]
Subordinated Borrowing [Line Items]
Subordinated Borrowing, Interest Rate	0.00%
Subordinated Debt, Current	$ 52,477