Investment Securities (Available-for-sale And Held-to-maturity Securities, Continuous Unrealized Loss Position) (Details) (USD $) | Sep. 30, 2013 | Dec. 31, 2012 |
In Thousands, unless otherwise specified | security | security |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 423 | 38 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | $500,570 | $155,341 |
12 months or longer, Fair Value | 25,242 | 13,152 |
Total, Fair Value | 525,812 | 168,493 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -4,626 | -922 |
12 months or longer, Unrealized losses | -293 | -299 |
Total, Unrealized losses | -4,919 | -1,221 |
Held-to-maturity, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 3 | 3 |
Held-to-maturity, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
12 months or longer, Fair Value | 8,288 | 8,443 |
Total, Fair Value | 8,288 | 8,443 |
Held-to-maturity, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
12 months or longer, Unrealized losses | -4,265 | -4,425 |
Total, Unrealized losses | -4,265 | -4,425 |
U.S. Government Agency Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 4 | ' |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 7,479 | ' |
Total, Fair Value | 7,479 | ' |
Federally Insured Student Loan Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 8 | 5 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 53,262 | 33,615 |
12 months or longer, Fair Value | 2,020 | ' |
Total, Fair Value | 55,282 | 33,615 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -602 | -83 |
12 months or longer, Unrealized losses | -20 | ' |
Total, Unrealized losses | -622 | -83 |
Tax-exempt Obligations Of States And Political Subdivisions [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 201 | 4 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 137,141 | 4,511 |
Total, Fair Value | 137,141 | 4,511 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -1,208 | -2 |
Total, Unrealized losses | -1,208 | -2 |
Taxable Obligations Of States And Political Subdivisions [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 52 | 6 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 47,138 | 2,357 |
12 months or longer, Fair Value | 1,819 | 4,529 |
Total, Fair Value | 48,957 | 6,886 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -479 | -11 |
12 months or longer, Unrealized losses | -11 | -10 |
Total, Unrealized losses | -490 | -21 |
Residential Mortgage-backed Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 30 | 17 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 124,240 | 107,926 |
12 months or longer, Fair Value | 12,781 | ' |
Total, Fair Value | 137,021 | 107,926 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -1,031 | -779 |
12 months or longer, Unrealized losses | -40 | ' |
Total, Unrealized losses | -1,071 | -779 |
Commercial Mortgage-backed Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 19 | 2 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 27,314 | 5,447 |
12 months or longer, Fair Value | 3,361 | ' |
Total, Fair Value | 30,675 | 5,447 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -262 | -32 |
12 months or longer, Unrealized losses | -26 | ' |
Total, Unrealized losses | -288 | -32 |
Corporate And Other Debt Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 109 | 4 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 103,996 | 1,485 |
12 months or longer, Fair Value | 5,261 | 8,623 |
Total, Fair Value | 109,257 | 10,108 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -1,044 | -15 |
12 months or longer, Unrealized losses | -196 | -289 |
Total, Unrealized losses | -1,240 | -304 |
Single Issuers [Member] | ' | ' |
Held-to-maturity, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 2 | 2 |
Held-to-maturity, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
12 months or longer, Fair Value | 7,925 | 7,850 |
Total, Fair Value | 7,925 | 7,850 |
Held-to-maturity, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
12 months or longer, Unrealized losses | -4,179 | -4,241 |
Total, Unrealized losses | -4,179 | -4,241 |
Pooled [Member] | ' | ' |
Held-to-maturity, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 1 | 1 |
Held-to-maturity, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
12 months or longer, Fair Value | 363 | 593 |
Total, Fair Value | 363 | 593 |
Held-to-maturity, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
12 months or longer, Unrealized losses | -86 | -184 |
Total, Unrealized losses | ($86) | ($184) |