How is this odd? People are arrested regularly and released on high bail.
They took his “travel documents”, which means his passport and/or canadian resident card. If he managed to flee to canada, he would be extradited back to the US, since money laundering and bail jumping are both crimes in Canada, as well as in the US.
You are constitutionally entitled to fair bail, and generally only denied in violent crimes and flight risks.
Amendment VIII
Excessive bail shall not be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted.
Quaint old document, no longer recognized by republicans as valid.