Deposits (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deposits [Abstract]
Brokered money market accounts	$ 41,765	$ 0
Demand and other noninterest-bearing	2,171,703	1,321,171
Interest-bearing demand	1,170,006	870,821
Money market	1,569,261	1,043,459
Savings	496,444	314,371
Certificates of deposit less than $100,000	288,943	252,544
Total core deposits	5,696,357	3,802,366
Certificates of deposit greater than $100,000	201,498	212,924
Certificates of deposit insured by CDARS®	19,488	26,720
Subtotal	5,959,108	4,042,010
Deposits, Valuation Adjustment From Acquisition Accounting	367	75
Total deposits	5,959,475	4,042,085
Deposit Liabilities Reclassified as Loans Receivable	1,100	528
Time Deposits, Fiscal Year Maturity [Abstract]
2014	172,422
2015	28,556
2016	11,834
2017	4,810
2018	2,162
Thereafter	106
Total	$ 219,890