Loans (Schedule of the Allowance for Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Schedule of allowance and recorded investment related to financing receivables segregated by portfolio segment
Beginning balance	$ 84,491	$ 88,333
Provision for loan losses	11,000	18,500
Charge-offs	(21,146)	(27,436)
Recoveries	4,727	5,094
Ending balance	79,072	84,491
Allowance for loan losses
Loans individually evaluated for impairment related to allowance for loan losses	1,591	8,108
Loans collectively evaluated for impairment related to allowance for loan losses	76,981	75,883
Allowance for loan losses related to loans acquired with deteriorated credit quality	500	500
Total	79,072	84,491
Loans individually evaluated for impairment related to recorded investment (loan balance)	107,313	106,228
Loans collectively evaluated for impairment related to recorded investment (loan balance)	4,245,611	3,668,912
Loans acquired with deteriorated credit quality related to recorded investment (loan balance)	294,697	392,595
Total loans	4,647,621	4,167,735
Commercial Loan Portfolio [Member]
Schedule of allowance and recorded investment related to financing receivables segregated by portfolio segment
Beginning balance	49,975	55,645
Provision for loan losses	3,895	7,061
Charge-offs	(12,280)	(15,723)
Recoveries	2,892	2,992
Ending balance	44,482	49,975
Allowance for loan losses
Loans individually evaluated for impairment related to allowance for loan losses	1,081	7,450
Loans collectively evaluated for impairment related to allowance for loan losses	43,401	42,525
Allowance for loan losses related to loans acquired with deteriorated credit quality	0	0
Total	44,482	49,975
Loans individually evaluated for impairment related to recorded investment (loan balance)	89,905	87,327
Loans collectively evaluated for impairment related to recorded investment (loan balance)	2,178,714	1,840,629
Loans acquired with deteriorated credit quality related to recorded investment (loan balance)	250,207	336,864
Total loans	2,518,826	2,264,820
Consumer Loan Portfolio [Member]
Schedule of allowance and recorded investment related to financing receivables segregated by portfolio segment
Beginning balance	29,333	29,166
Provision for loan losses	7,843	9,778
Charge-offs	(8,866)	(11,713)
Recoveries	1,835	2,102
Ending balance	30,145	29,333
Allowance for loan losses
Loans individually evaluated for impairment related to allowance for loan losses	510	658
Loans collectively evaluated for impairment related to allowance for loan losses	29,135	28,175
Allowance for loan losses related to loans acquired with deteriorated credit quality	500	500
Total	30,145	29,333
Loans individually evaluated for impairment related to recorded investment (loan balance)	17,408	18,901
Loans collectively evaluated for impairment related to recorded investment (loan balance)	2,066,897	1,828,283
Loans acquired with deteriorated credit quality related to recorded investment (loan balance)	44,490	55,731
Total loans	2,128,795	1,902,915
Unallocated [Member]
Schedule of allowance and recorded investment related to financing receivables segregated by portfolio segment
Beginning balance	5,183	3,522
Provision for loan losses	(738)	1,661
Charge-offs	0	0
Recoveries	0	0
Ending balance	4,445	5,183
Allowance for loan losses
Loans individually evaluated for impairment related to allowance for loan losses	0	0
Loans collectively evaluated for impairment related to allowance for loan losses	4,445	5,183
Allowance for loan losses related to loans acquired with deteriorated credit quality	0	0
Total	4,445	5,183
Loans individually evaluated for impairment related to recorded investment (loan balance)	0	0
Loans collectively evaluated for impairment related to recorded investment (loan balance)	0	0
Loans acquired with deteriorated credit quality related to recorded investment (loan balance)	0	0
Total loans	$ 0	$ 0

The balance of financing receivables that were acquired with deteriorated credit quality.

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The valuation allowance for financing receivables acquired with deteriorated credit quality.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of direct write-downs of financing receivables charged against the allowance.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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