Fair Value of Financial Instruments, Part 1 (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Securities available-for sale [Abstract]
Total securities available for sale	$ 811,770	$ 863,754
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities available-for sale [Abstract]
Total securities available for sale	35	10
Significant Other Observable Inputs (Level 2) [Member]
Securities available-for sale [Abstract]
Total securities available for sale	811,735	863,744
Significant Unobservable Inputs (Level 3) [Member]
Securities available-for sale [Abstract]
Total securities available for sale	0	0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Securities available-for sale [Abstract]
U.S. government-sponsored enterprises	0	0
State and political subdivisions	0	0
Mortgage-backed securities and collateralized mortgage obligations - residential	0	0
Corporate bonds	0	0
Small Business Administration-guaranteed participation securities	0	0
Mortgage-backed securities and collateralized mortgage obligations - commercial	0	0
Other securities and equity securities	35	10
Total securities available for sale	35	10
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Securities available-for sale [Abstract]
U.S. government-sponsored enterprises	103,340	198,829
State and political subdivisions	3,921	7,758
Mortgage-backed securities and collateralized mortgage obligations - residential	589,517	532,449
Corporate bonds	1,402	10,471
Small Business Administration-guaranteed participation securities	102,367	103,029
Mortgage-backed securities and collateralized mortgage obligations - commercial	10,544	10,558
Other securities and equity securities	644	650
Total securities available for sale	811,735	863,744
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Securities available-for sale [Abstract]
U.S. government-sponsored enterprises	0	0
State and political subdivisions	0	0
Mortgage-backed securities and collateralized mortgage obligations - residential	0	0
Corporate bonds	0	0
Small Business Administration-guaranteed participation securities	0	0
Mortgage-backed securities and collateralized mortgage obligations - commercial	0	0
Other securities and equity securities	0	0
Total securities available for sale	0	0
Recurring [Member] | Carrying Value [Member]
Securities available-for sale [Abstract]
U.S. government-sponsored enterprises	103,340	198,829
State and political subdivisions	3,921	7,758
Mortgage-backed securities and collateralized mortgage obligations - residential	589,517	532,449
Corporate bonds	1,402	10,471
Small Business Administration-guaranteed participation securities	102,367	103,029
Mortgage-backed securities and collateralized mortgage obligations - commercial	10,544	10,558
Other securities and equity securities	679	660
Total securities available for sale	$ 811,770	$ 863,754