Fair Value Measurements (Assets Measured At Fair Value On A Recurring And Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
U.S. Government gency securities	$ 10,726	$ 7,500
Federally insured student loan securities	147,573	143,770
Obligation of states and political subdivisions	458,118	159,093
Residential mortgage-backed securities	322,774	277,807
Commercial mortgage-backed securities	120,347	97,031
Other debt securities	193,579	32,864
Total investment securities available-for-sale	1,253,117	718,065
Loans held for sale	69,904	11,341
Interest rate swaps	481	45
Total assets	1,323,502	729,451
Fair Value, Measurements, Nonrecurring [Member]
Assets measured on a nonrecurring basis [Abstract]
Impaired loans	40,767	25,841
Other real estate owned	26,295	4,241
Intangible assets	7,612	7,004
Assets nonrecurring	74,674	37,086
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Assets measured at fair value on a recurring basis [Abstract]
Total investment securities available-for-sale	64,971
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
U.S. Government gency securities	400
Obligation of states and political subdivisions	2,277
Other debt securities	62,294
Total investment securities available-for-sale	64,971
Total assets	64,971
Significant Other Observable Inputs (Level 2) [Member]
Assets measured at fair value on a recurring basis [Abstract]
Total investment securities available-for-sale	1,187,595	717,468
Interest rate swaps	481	45
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
U.S. Government gency securities	10,326	7,500
Federally insured student loan securities	147,573	143,770
Obligation of states and political subdivisions	455,841	159,093
Residential mortgage-backed securities	322,774	277,807
Commercial mortgage-backed securities	120,347	97,031
Other debt securities	130,734	32,267
Total investment securities available-for-sale	1,187,595	717,468
Interest rate swaps	481
Total assets	1,188,076	717,468
Significant Unobservable Inputs (Level 3) [Member]
Assets measured at fair value on a recurring basis [Abstract]
Total investment securities available-for-sale	551	597
Loans held for sale	69,904	11,341
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
Other debt securities	551	597
Total investment securities available-for-sale	551	597
Loans held for sale	69,904	11,341
Interest rate swaps		45
Total assets	70,455	11,983
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured on a nonrecurring basis [Abstract]
Impaired loans	40,767	25,841
Other real estate owned	26,295	4,241
Intangible assets	7,612	7,004
Assets nonrecurring	$ 74,674	$ 37,086