Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]

The following table summarizes the above financial instruments at the dates indicated:

	March 31, 2018		December 31, 2017
	(Dollars in thousands)
Commitments to extend credit	$	2,502,731	$	2,443,478
Standby letters of credit	15,994		15,534
Deferred standby letter of credit fees	114		102