Derivative Financial Instruments (Schedule Of Interest Rate Swaps) (Details) (Detail) (Cash Flow Hedges [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Interest Rate Swap 1 [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	$ 50,000
Fair Value Gain (Loss)	(1,158)
Interest Rate Swap 2 [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	40,000
Fair Value Gain (Loss)	(1,008)
Interest Rate Swap 3 [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	50,000
Fair Value Gain (Loss)	(2,887)
Interest Rate Swap 4 [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	25,000
Fair Value Gain (Loss)	(1,503)
Total Interest Rate Swap [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	165,000
Fair Value Gain (Loss)	(6,556)
Interest Rate Caps 1 [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	20,000
Fair Value Gain (Loss)	0
Interest Rate Caps 2 [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	40,000
Fair Value Gain (Loss)	1
Total Interest Rate Cap [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	60,000
Fair Value Gain (Loss)	1
Interest Rate Swaps And Caps [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Notional Amount	225,000
Fair Value Gain (Loss)	$ (6,555)