Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Jun. 30, 2016 |
Dec. 31, 2015 |
|
Loss Contingencies [Line Items] | ||
Customer credits and transaction losses, reimbursement amount | $ 4.1 | |
Line of Credit [Member] | Standby Letters of Credit [Member] | ||
Loss Contingencies [Line Items] | ||
Letters of credit outstanding, amount | $ 1.5 | $ 1.5 |