Loans and Allowance for Loan Losses (Loans Individually Evaluated for Impairment Disaggregated by Class) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 95,507		$ 55,034
Recorded Investment, With an allowance recorded	135,234		58,392
Recorded Investment, Total	230,741		113,426
Unpaid Principal Balance, With no related allowance recorded	103,848		58,245
Unpaid Principal Balance, With an allowance recorded	138,375		60,378
Unpaid Principal Balance, Total	242,223		118,623
Related Allowance	28,167		20,988
Average Recorded Investment, With no related allowance recorded	75,271	$ 19,242
Average Recorded Investment, With an allowance recorded	96,813	16,256
Average Recorded Investment, Total	172,084	35,498
Interest Income Recognized, With no related allowance recorded	9	11
Interest Income Recognized, With an allowance recorded	212	64
Interest Income Recognized, Total	221	75
Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	95,507		55,034
Recorded Investment, With an allowance recorded	132,928		56,052
Recorded Investment, Total	228,435		111,086
Unpaid Principal Balance, With no related allowance recorded	103,848		58,245
Unpaid Principal Balance, With an allowance recorded	136,032		57,996
Unpaid Principal Balance, Total	239,880		116,241
Related Allowance	28,160		20,955
Average Recorded Investment, With no related allowance recorded	75,271	19,242
Average Recorded Investment, With an allowance recorded	94,490	13,621
Average Recorded Investment, Total	169,761	32,863
Interest Income Recognized, With no related allowance recorded	9	11
Interest Income Recognized, With an allowance recorded	212	64
Interest Income Recognized, Total	221	$ 75
Acquired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded	2,306		2,340
Recorded Investment, Total	2,306		2,340
Unpaid Principal Balance, With an allowance recorded	2,343		2,382
Unpaid Principal Balance, Total	2,343		2,382
Related Allowance	$ 7		33
Average Recorded Investment, With no related allowance recorded
Average Recorded Investment, With an allowance recorded	$ 2,323	$ 2,635
Average Recorded Investment, Total	$ 2,323	$ 2,635
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded
Interest Income Recognized, Total
Commercial Non-Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 77,155		34,788
Recorded Investment, With an allowance recorded	123,874		46,834
Recorded Investment, Total	201,029		81,622
Unpaid Principal Balance, With no related allowance recorded	85,295		37,285
Unpaid Principal Balance, With an allowance recorded	125,744		47,703
Unpaid Principal Balance, Total	211,039		84,988
Related Allowance	26,502		19,031
Average Recorded Investment, With no related allowance recorded	55,972	$ 7,196
Average Recorded Investment, With an allowance recorded	85,354	2,081
Average Recorded Investment, Total	$ 141,326	9,277
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded	$ 182	2
Interest Income Recognized, Total	182	2
Commercial Non-Real Estate [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	77,155		34,788
Recorded Investment, With an allowance recorded	123,874		46,834
Recorded Investment, Total	201,029		81,622
Unpaid Principal Balance, With no related allowance recorded	85,295		37,285
Unpaid Principal Balance, With an allowance recorded	125,744		47,703
Unpaid Principal Balance, Total	211,039		84,988
Related Allowance	26,502		$ 19,031
Average Recorded Investment, With no related allowance recorded	55,972	7,196
Average Recorded Investment, With an allowance recorded	85,354	2,081
Average Recorded Investment, Total	$ 141,326	9,277
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded	$ 182	2
Interest Income Recognized, Total	$ 182	$ 2
Commercial Non-Real Estate [Member] | Acquired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded
Recorded Investment, Total
Unpaid Principal Balance, With an allowance recorded
Unpaid Principal Balance, Total
Related Allowance
Average Recorded Investment, With no related allowance recorded
Average Recorded Investment, With an allowance recorded
Average Recorded Investment, Total
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded
Interest Income Recognized, Total
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 5,939		$ 7,785
Recorded Investment, With an allowance recorded	8,760		8,746
Recorded Investment, Total	14,699		16,531
Unpaid Principal Balance, With no related allowance recorded	6,140		8,499
Unpaid Principal Balance, With an allowance recorded	8,864		8,795
Unpaid Principal Balance, Total	15,004		17,294
Related Allowance	1,339		1,405
Average Recorded Investment, With no related allowance recorded	6,862	$ 9,563
Average Recorded Investment, With an allowance recorded	8,753	7,738
Average Recorded Investment, Total	15,615	17,301
Interest Income Recognized, With no related allowance recorded	9	10
Interest Income Recognized, With an allowance recorded	27	17
Interest Income Recognized, Total	36	27
Commercial Real Estate [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	5,939		7,785
Recorded Investment, With an allowance recorded	6,454		6,406
Recorded Investment, Total	12,393		14,191
Unpaid Principal Balance, With no related allowance recorded	6,140		8,499
Unpaid Principal Balance, With an allowance recorded	6,521		6,413
Unpaid Principal Balance, Total	12,661		14,912
Related Allowance	1,332		1,372
Average Recorded Investment, With no related allowance recorded	6,862	9,563
Average Recorded Investment, With an allowance recorded	6,430	5,103
Average Recorded Investment, Total	13,292	14,666
Interest Income Recognized, With no related allowance recorded	9	10
Interest Income Recognized, With an allowance recorded	27	17
Interest Income Recognized, Total	36	$ 27
Commercial Real Estate [Member] | Acquired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded	2,306		2,340
Recorded Investment, Total	2,306		2,340
Unpaid Principal Balance, With an allowance recorded	2,343		2,382
Unpaid Principal Balance, Total	2,343		2,382
Related Allowance	$ 7		$ 33
Average Recorded Investment, With no related allowance recorded
Average Recorded Investment, With an allowance recorded	$ 2,323	$ 2,635
Average Recorded Investment, Total	$ 2,323	$ 2,635
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded
Interest Income Recognized, Total
Residential Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded
Recorded Investment, With an allowance recorded	$ 883		$ 895
Recorded Investment, Total	$ 883		$ 895
Unpaid Principal Balance, With no related allowance recorded
Unpaid Principal Balance, With an allowance recorded	$ 1,394		$ 1,405
Unpaid Principal Balance, Total	1,394		1,405
Related Allowance	125		$ 127
Average Recorded Investment, With no related allowance recorded		$ 517
Average Recorded Investment, With an allowance recorded	889	2,023
Average Recorded Investment, Total	$ 889	2,540
Interest Income Recognized, With no related allowance recorded		1
Interest Income Recognized, With an allowance recorded	$ 2	11
Interest Income Recognized, Total	$ 2	12
Residential Mortgages [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded
Recorded Investment, With an allowance recorded	$ 883		$ 895
Recorded Investment, Total	$ 883		$ 895
Unpaid Principal Balance, With no related allowance recorded
Unpaid Principal Balance, With an allowance recorded	$ 1,394		$ 1,405
Unpaid Principal Balance, Total	1,394		1,405
Related Allowance	125		$ 127
Average Recorded Investment, With no related allowance recorded		517
Average Recorded Investment, With an allowance recorded	889	2,023
Average Recorded Investment, Total	$ 889	2,540
Interest Income Recognized, With no related allowance recorded		1
Interest Income Recognized, With an allowance recorded	$ 2	11
Interest Income Recognized, Total	$ 2	$ 12
Residential Mortgages [Member] | Acquired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded
Recorded Investment, Total
Unpaid Principal Balance, With an allowance recorded
Unpaid Principal Balance, Total
Related Allowance
Average Recorded Investment, With no related allowance recorded
Average Recorded Investment, With an allowance recorded
Average Recorded Investment, Total
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded
Interest Income Recognized, Total
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded
Recorded Investment, With an allowance recorded	$ 58		$ 152
Recorded Investment, Total	$ 58		$ 152
Unpaid Principal Balance, With no related allowance recorded
Unpaid Principal Balance, With an allowance recorded	$ 58		$ 152
Unpaid Principal Balance, Total	58		152
Related Allowance	16		$ 33
Average Recorded Investment, With no related allowance recorded		$ 51
Average Recorded Investment, With an allowance recorded	105	13
Average Recorded Investment, Total	$ 105	64
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded	$ 1	2
Interest Income Recognized, Total	$ 1	2
Consumer [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded
Recorded Investment, With an allowance recorded	$ 58		$ 152
Recorded Investment, Total	$ 58		$ 152
Unpaid Principal Balance, With no related allowance recorded
Unpaid Principal Balance, With an allowance recorded	$ 58		$ 152
Unpaid Principal Balance, Total	58		152
Related Allowance	16		$ 33
Average Recorded Investment, With no related allowance recorded		51
Average Recorded Investment, With an allowance recorded	105	13
Average Recorded Investment, Total	$ 105	64
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded	$ 1	2
Interest Income Recognized, Total	$ 1	$ 2
Consumer [Member] | Acquired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded
Recorded Investment, Total
Unpaid Principal Balance, With an allowance recorded
Unpaid Principal Balance, Total
Related Allowance
Average Recorded Investment, With no related allowance recorded
Average Recorded Investment, With an allowance recorded
Average Recorded Investment, Total
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded
Interest Income Recognized, Total
Construction and Land Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 12,413		$ 12,461
Recorded Investment, With an allowance recorded	1,659		1,765
Recorded Investment, Total	14,072		14,226
Unpaid Principal Balance, With no related allowance recorded	12,413		12,461
Unpaid Principal Balance, With an allowance recorded	2,315		2,323
Unpaid Principal Balance, Total	14,728		14,784
Related Allowance	185		392
Average Recorded Investment, With no related allowance recorded	12,437	$ 1,915
Average Recorded Investment, With an allowance recorded	1,712	4,401
Average Recorded Investment, Total	$ 14,149	6,316
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded		32
Interest Income Recognized, Total		32
Construction and Land Development [Member] | Originated Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 12,413		12,461
Recorded Investment, With an allowance recorded	1,659		1,765
Recorded Investment, Total	14,072		14,226
Unpaid Principal Balance, With no related allowance recorded	12,413		12,461
Unpaid Principal Balance, With an allowance recorded	2,315		2,323
Unpaid Principal Balance, Total	14,728		14,784
Related Allowance	185		$ 392
Average Recorded Investment, With no related allowance recorded	12,437	1,915
Average Recorded Investment, With an allowance recorded	1,712	4,401
Average Recorded Investment, Total	$ 14,149	6,316
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded		32
Interest Income Recognized, Total		$ 32
Construction and Land Development [Member] | Acquired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With an allowance recorded
Recorded Investment, Total
Unpaid Principal Balance, With an allowance recorded
Unpaid Principal Balance, Total
Related Allowance
Average Recorded Investment, With no related allowance recorded
Average Recorded Investment, With an allowance recorded
Average Recorded Investment, Total
Interest Income Recognized, With no related allowance recorded
Interest Income Recognized, With an allowance recorded
Interest Income Recognized, Total