Allowance for Loan Losses (Schedule of Credit Losses Related to Originated Financing Receivables, Current and Non-Current) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, write-downs	$ (6,500)	$ (14,700)
Provision for loan losses	(45,100)	(52,279)	$ (33,684)
Total originated loans					$ 130,458
Commercial and Industrial Financing Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					7,318
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					45,648
Construction Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					339
Installment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					25,880
Home Equity Line of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					23,201
Credit Card Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					854
Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Total originated loans					27,218
Originated Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	95,696	96,484	98,942
Allowance for credit losses, write-downs	(48,778)	(44,923)	(40,173)
Recoveries	18,483	20,964	24,681
Provision for loan losses	39,734	23,171	13,034
Balance at the end of the period	105,135	95,696	96,484
Individually evaluated for impairment				$ 14,349	5,950	$ 6,146
Collectively evaluated for impairment				90,786	89,746	90,338
Allowance for credit losses	95,696	96,484	98,942	105,135	95,696	96,484
Originated loans individually evaluated for impairment				129,038	93,448	87,764
Originated loans collectively evaluated for impairment				13,989,467	12,400,364	10,125,623
Total originated loans				14,118,505	12,493,812	10,213,387
Originated Loans | Commercial and Industrial Financing Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	37,375	42,981	36,209
Allowance for credit losses, write-downs	(14,913)	(9,617)	(5,840)
Recoveries	1,196	3,872	7,981
Provision for loan losses	21,102	139	4,631
Balance at the end of the period	44,760	37,375	42,981
Individually evaluated for impairment				11,837	72	3,235
Collectively evaluated for impairment				32,923	37,303	39,746
Allowance for credit losses	37,375	42,981	36,209	44,760	37,375	42,981
Originated loans individually evaluated for impairment				43,818	11,759	8,053
Originated loans collectively evaluated for impairment				5,749,590	5,163,442	4,131,514
Total originated loans				5,793,408	5,175,201	4,139,567
Originated Loans | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	10,492	12,265	20,126
Allowance for credit losses, write-downs	(625)	(3,512)	(1,281)
Recoveries	517	515	524
Provision for loan losses	(753)	1,224	(7,104)
Balance at the end of the period	9,631	10,492	12,265
Individually evaluated for impairment				128	2,914	229
Collectively evaluated for impairment				9,503	7,578	12,036
Allowance for credit losses	10,492	12,265	20,126	9,631	10,492	12,265
Originated loans individually evaluated for impairment				16,614	23,300	20,616
Originated loans collectively evaluated for impairment				2,060,730	2,093,818	2,149,171
Total originated loans				2,077,344	2,117,118	2,169,787
Originated Loans | Construction Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	2,202	2,810	3,821
Allowance for credit losses, write-downs	0	0	(516)
Recoveries	178	39	507
Provision for loan losses	(786)	(647)	(1,002)
Balance at the end of the period	1,594	2,202	2,810
Individually evaluated for impairment				0	0	0
Collectively evaluated for impairment				1,594	2,202	2,810
Allowance for credit losses	2,202	2,810	3,821	1,594	2,202	2,810
Originated loans individually evaluated for impairment				0	0	906
Originated loans collectively evaluated for impairment				645,337	537,766	338,019
Total originated loans				645,337	537,766	338,925
Originated Loans | Leases
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	674	1,081	639
Allowance for credit losses, write-downs	(1,268)	0	(1,237)
Recoveries	787	379	100
Provision for loan losses	1,120	(786)	1,579
Balance at the end of the period	1,313	674	1,081
Individually evaluated for impairment				0	0	0
Collectively evaluated for impairment				1,313	674	1,081
Allowance for credit losses	674	1,081	639	1,313	674	1,081
Originated loans individually evaluated for impairment				0	0	0
Originated loans collectively evaluated for impairment				491,741	370,179	239,551
Total originated loans				491,741	370,179	239,551
Originated Loans | Installment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	12,918	11,935	11,154
Allowance for credit losses, write-downs	(21,630)	(20,328)	(16,683)
Recoveries	11,547	11,185	10,519
Provision for loan losses	11,348	10,126	6,945
Balance at the end of the period	14,183	12,918	11,935
Individually evaluated for impairment				1,009	1,178	1,014
Collectively evaluated for impairment				13,174	11,740	10,921
Allowance for credit losses	12,918	11,935	11,154	14,183	12,918	11,935
Originated loans individually evaluated for impairment				36,904	24,905	27,285
Originated loans collectively evaluated for impairment				2,953,445	2,368,546	1,700,640
Total originated loans				2,990,349	2,393,451	1,727,925
Originated Loans | Home Equity Line of Credit
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	19,324	12,900	13,724
Allowance for credit losses, write-downs	(4,032)	(4,831)	(7,172)
Recoveries	2,606	2,940	2,979
Provision for loan losses	2,196	8,315	3,369
Balance at the end of the period	20,094	19,324	12,900
Individually evaluated for impairment				188	207	223
Collectively evaluated for impairment				19,906	19,117	12,677
Allowance for credit losses	19,324	12,900	13,724	20,094	19,324	12,900
Originated loans individually evaluated for impairment				7,080	7,379	6,726
Originated loans collectively evaluated for impairment				1,241,358	1,102,957	913,340
Total originated loans				1,248,438	1,110,336	920,066
Originated Loans | Credit Card Receivable
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	7,966	7,740	7,384
Allowance for credit losses, write-downs	(4,867)	(4,604)	(5,541)
Recoveries	1,395	1,716	1,841
Provision for loan losses	4,337	3,114	4,056
Balance at the end of the period	8,831	7,966	7,740
Individually evaluated for impairment				243	296	312
Collectively evaluated for impairment				8,588	7,670	7,428
Allowance for credit losses	7,966	7,740	7,384	8,831	7,966	7,740
Originated loans individually evaluated for impairment				717	854	1,112
Originated loans collectively evaluated for impairment				182,126	163,624	147,201
Total originated loans				182,843	164,478	148,313
Originated Loans | Residential Mortgages
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at the beginning of the period	4,745	4,772	5,885
Allowance for credit losses, write-downs	(1,443)	(2,031)	(1,903)
Recoveries	257	318	230
Provision for loan losses	1,170	1,686	560
Balance at the end of the period	4,729	4,745	4,772
Individually evaluated for impairment				944	1,283	1,133
Collectively evaluated for impairment				3,785	3,462	3,639
Allowance for credit losses	$ 4,745	$ 4,772	$ 5,885	4,729	4,745	4,772
Originated loans individually evaluated for impairment				23,905	25,251	23,066
Originated loans collectively evaluated for impairment				665,140	600,032	506,187
Total originated loans				$ 689,045	$ 625,283	$ 529,253