	December 31,
	2018			2017
	(Dollars in Thousands)
Federal Home Loan Bank advances—short-term
Balance at year end	$	268,975		$	945,225
Rate on balance outstanding at year end		2.70	%		1.44	%
Average daily balance	$	621,357		$	839,858
Average rate		1.97	%		1.23	%
Maximum amount outstanding at any month end	$	1,007,100		$	1,043,250
Federal Home Loan Bank advances—long-term(1)
Balance at year end	$	436,690		$	250,000
Rate on balance outstanding at year end		1.73	%		1.26	%
Average daily balance	$	302,373		$	51,644
Average rate		1.71	%		1.26	%
Maximum amount outstanding at any month end	$	436,700		$	250,000

Long-term advances at December 31, 2018 consisted of both amortizing and non-amortizing advances. The non-amortizing advances mature in the following increments: $75,000,000 in July 2028, $100,000,000 in March 2033 and $250,000,000 in August 2033 and are callable by the FHLB on an annual basis. Two amortizing advances are outstanding at December 31, 2018 in the amounts of $3,200,000 and $8,490,000 and mature in December 2033 and November 2033, respectively. The amortization on the amortizing long-term advances totals approximately $179,000 per year for each of the next five years. Long-term advances outstanding at December 31, 2017 mature in the following increments: $100,000,000 in November 2027 and $150,000,000 in December 2027 and are callable by the FHLB on a quarterly basis.