Investment Securities (Available-for-sale And Held-to-maturity Securities, Continuous Unrealized Loss Position) (Details) (USD $) | 6 Months Ended | 12 Months Ended |
In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013 |
| security | security |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 169 | 459 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | $143,489 | $592,970 |
12 months or longer, Fair Value | 188,514 | 67,734 |
Total, Fair Value | 332,003 | 660,704 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -961 | -6,443 |
12 months or longer, Unrealized losses | -1,416 | -866 |
Total, Unrealized losses | -2,377 | -7,309 |
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 | 7,941 | 7,887 |
Total, Fair Value | 7,941 | 7,887 |
Held-to-maturity, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
12 months or longer, Unrealized losses | -4,177 | -4,222 |
Total, Unrealized losses | -4,177 | -4,222 |
U.S. Government Agency Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 1 | ' |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 1,792 | ' |
Total, Fair Value | 1,792 | ' |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -3 | ' |
Total, Unrealized losses | -3 | ' |
Federally insured student loan securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 5 | 4 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | ' | 3,300 |
12 months or longer, Fair Value | 40,955 | ' |
Total, Fair Value | 40,955 | 3,300 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
12 months or longer, Unrealized losses | -113 | ' |
Total, Unrealized losses | -113 | ' |
Tax-exempt Obligations Of States And Political Subdivisions [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 61 | 9 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 19,994 | 50,498 |
12 months or longer, Fair Value | 24,949 | 6,202 |
Total, Fair Value | 44,943 | 56,700 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -90 | -676 |
12 months or longer, Unrealized losses | -131 | -44 |
Total, Unrealized losses | -221 | -720 |
Taxable obligations of states and political subdivisions [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 13 | 229 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | ' | 169,995 |
12 months or longer, Fair Value | 11,377 | ' |
Total, Fair Value | 11,377 | 169,995 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | ' | -1,951 |
12 months or longer, Unrealized losses | -125 | ' |
Total, Unrealized losses | -125 | -1,951 |
Residential Mortgage-backed Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 30 | 52 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 46,700 | 46,888 |
12 months or longer, Fair Value | 72,778 | 1,808 |
Total, Fair Value | 119,478 | 48,696 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -195 | -737 |
12 months or longer, Unrealized losses | -705 | -9 |
Total, Unrealized losses | -900 | -746 |
Commercial Mortgage-backed Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 25 | 38 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 70,579 | 147,717 |
12 months or longer, Fair Value | 7,909 | 55,064 |
Total, Fair Value | 78,488 | 202,781 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -665 | -1,656 |
12 months or longer, Unrealized losses | -119 | -606 |
Total, Unrealized losses | -784 | -2,262 |
Corporate And Other Debt Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | 34 | 26 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | 4,424 | 76,668 |
12 months or longer, Fair Value | 30,546 | 405 |
Total, Fair Value | 34,970 | 77,073 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | -8 | -399 |
12 months or longer, Unrealized losses | -223 | -11 |
Total, Unrealized losses | -231 | -410 |
Other Equity Securities [Member] | ' | ' |
Available-for-sale, continuous unrealized loss position [Abstract] | ' | ' |
Number of securities | ' | 101 |
Available-for-sale, continuous unrealized loss position, Fair Value [Abstract] | ' | ' |
Less than 12 months, Fair Value | ' | 97,904 |
12 months or longer, Fair Value | ' | 4,255 |
Total, Fair Value | ' | 102,159 |
Available-for-sale, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
Less than 12 months, Unrealized losses | ' | -1,024 |
12 months or longer, Unrealized losses | ' | -196 |
Total, Unrealized losses | ' | -1,220 |
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 | 7,941 | 7,887 |
Total, Fair Value | 7,941 | 7,887 |
Held-to-maturity, continuous unrealized loss position, Unrealized losses [Abstract] | ' | ' |
12 months or longer, Unrealized losses | -4,177 | -4,222 |
Total, Unrealized losses | ($4,177) | ($4,222) |