Condensed Financial Information-Parent Only (Schedule Of Condensed Cash Flow Statement) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income (loss)	$ 18,619	$ (5,575)	$ 174	$ 214	$ 20,191	$ 24,969	$ 10,322	$ 1,627	$ 13,432	$ 57,109	$ (14,422)
Decrease (increase) in other assets									2,391	21,966	(222)
Increase (decrease) in other liabilities									4,044	(26,155)	15,284
Stock-based compensation expense									1,975	2,641	3,157
Net cash used in operating activities									(234,880)	(49,993)	(39,005)
Investing activities
Contribution to subsidiary									12,645	(193,595)
Net cash provided by (used in) investing activities									501,323	(418,812)	(657,357)
Financing activities
Proceeds from issuance of common stock											1,629
Proceeds from the exercise of common stock options										103	1,653
Net cash (used in) provided by financing activities									(225,516)	347,091	965,723
Net increase (decrease) in cash and cash equivalents									40,927	(121,714)	269,361
Cash and cash equivalents, beginning of year				1,114,235				1,235,949	1,114,235	1,235,949	966,588
Cash and cash equivalents, end of year	1,155,162				1,114,235				1,155,162	1,114,235	1,235,949
The Bancorp [Member]
Operating activities
Net income (loss)									13,432	57,109	(14,422)
Decrease (increase) in other assets									1,580	(3,441)	(1,735)
Increase (decrease) in other liabilities									(18)	21	(73)
Stock-based compensation expense									1,975	2,641	3,157
Equity in undistributed income									(14,730)	(58,802)	12,939
Net cash used in operating activities									2,239	(2,472)	(134)
Investing activities
Purchase of equity security									3,857	(3,857)
Contribution to subsidiary									(3,009)	(58,000)	(16,798)
Net cash provided by (used in) investing activities									848	(61,857)	(16,798)
Financing activities
Proceeds from issuance of common stock											1,629
Proceeds from the exercise of common stock options										103	1,653
Net cash (used in) provided by financing activities										103	3,282
Net increase (decrease) in cash and cash equivalents									3,087	(64,226)	(13,650)
Cash and cash equivalents, beginning of year				$ 6,386				$ 70,612	6,386	70,612	84,262
Cash and cash equivalents, end of year	$ 9,473				$ 6,386				$ 9,473	$ 6,386	$ 70,612