Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Available-for-sale Securities [Abstract]
Due within one year, Amortized Cost	$ 21,359
Due after one year through five years, Amortized Cost	332,516
Due after five years through ten years, Amortized Cost	431,423
Due after ten years, Amortized Cost	791,407
No stated maturity date, Amortized Cost Basis	5,284
Total investment securities available-for-sale, Amortized Cost	1,581,989
Due within one year, Fair Value	21,470
Due after one year through five years, Fair Value	333,068
Due after five years through ten years, Fair Value	432,434
Due after ten years, Fair Value	797,878
No stated maturity date, Fair Value	5,167
Total investment securities available-for-sale, Fair Value	$ 1,590,017