Stockholders' Equity (Regulatory Capital Ratios) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Marlin Business Services Corp. [Member]
  
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]  
Tier One Leverage Capital $ 163,236
Tier One Leverage Capital Required for Capital Adequacy 27,834
Tier One Leverage Capital Required to be Well Capitalized 34,792
Tier One Risk Based Capital 163,236
Tier One Risk Based Capital Required for Capital Adequacy 25,208
Tier One Risk Based Capital Required to be Well Capitalized 37,812
Total Risk Based Capital 171,121
Total Risk Based Capital Required for Capital Adequacy 50,416
Total Risk Based Capital Required to be Well Capitalized 63,020
Tier One Leverage Capital to Average Assets 23.46%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 4.00%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00%
Tier One Risk Based Capital to Risk Weighted Assets 25.90%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.00%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.00%
Total Risk Based Capital to Risk Weighted Assets 27.15%
Total Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 8.00%
Total Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 10.00%
MBB [Member]
  
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]  
Tier One Leverage Capital 95,454
Tier One Leverage Capital Required for Capital Adequacy 30,397
Tier One Leverage Capital Required to be Well Capitalized 30,397
Tier One Risk Based Capital 95,454
Tier One Risk Based Capital Required for Capital Adequacy 34,959
Tier One Risk Based Capital Required to be Well Capitalized 34,959
Total Risk Based Capital 102,749
Total Risk Based Capital Required for Capital Adequacy 87,396
Total Risk Based Capital Required to be Well Capitalized $ 58,264
Tier One Leverage Capital to Average Assets 15.70%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets 5.00%
Tier One Leverage Capital Required to be Well Capitalized to Average Assets 5.00%
Tier One Risk Based Capital to Risk Weighted Assets 16.38%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 6.00%
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.00%
Total Risk Based Capital to Risk Weighted Assets 17.63%
Total Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 15.00%
Total Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 10.00% [1]
[1]

MBB is required to maintain “well-capitalized” status and must also maintain a total risk-based capital ratio greater than 15% pursuant to an agreement entered into by and among MBB, the Company, Marlin Leasing Corporation and the FDIC in conjunction with the opening of MBB (the “FDIC Agreement”).