Fair Value (Tables)

6 Months Ended

Jun. 30, 2020

Fair Value

Schedule of financial assets and liabilities measured on a recurring basis

			Fair Value Measurements Using
					Significant
			Quoted Prices in		Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Balance		(Level 1)		(Level 2)		(Level 3)
	(Dollars in thousands)
Assets at June 30, 2020
Available-for-sale securities:
Agency mortgage-backed securities	$	232,335		—	$	232,335		—
U.S. Treasury		91,230		91,230		—		—
I/O strip receivables		482		—		482		—
Assets at December 31, 2019
Available-for-sale securities:
Agency mortgage-backed securities	$	284,361		—	$	284,361		—
U.S. Treasury		120,464		120,464		—		—
I/O strip receivables		503		—		503		—

Schedule of carrying amounts and estimated fair values of financial instruments

			Estimated Fair Value
					Significant
			Quoted Prices in		Other		Significant
			Active Markets for		Observable		Unobservable
	Carrying		Identical Assets		Inputs		Inputs
	Amounts		(Level 1)		(Level 2)		(Level 3)		Total
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	925,900	$	925,900	$	—	$	—	$	925,900
Securities available-for-sale		323,565		91,230		232,335		—		323,565
Securities held-to-maturity		322,677		—		332,452		—		332,452
Loans (including loans held-for-sale), net		2,645,269		—		4,324		2,631,042		2,635,366
FHLB stock, FRB stock, and other
investments		33,509		—		—		—		N/A
Accrued interest receivable		10,041		369		1,778		7,894		10,041
I/O strips receivables		482		—		482		—		482
Liabilities:
Time deposits	$	150,261	$	—	$	146,776	$	—	$	146,776
Other deposits		3,749,965		—		3,749,965		—		3,749,965
Subordinated debt		39,646		—		38,946		—		38,946
Accrued interest payable		585		—		585		—		585

			Estimated Fair Value
					Significant
			Quoted Prices in		Other		Significant
			Active Markets for		Observable		Unobservable
	Carrying		Identical Assets		Inputs		Inputs
	Amounts		(Level 1)		(Level 2)		(Level 3)		Total
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	457,370	$	457,370	$	—	$	—	$	457,370
Securities available-for-sale		404,825		120,464		284,361		—		404,825
Securities held-to-maturity		366,560		—		368,107		—		368,107
Loans (including loans held-for-sale), net		2,511,611		—		1,052		2,512,277		2,513,329
FHLB stock, FRB stock, and other
investments		29,842		—		—		—		N/A
Accrued interest receivable		10,915		446		2,218		8,251		10,915
I/O strips receivables		503		—		503		—		503
Liabilities:
Time deposits	$	168,034	$	—	$	158,704	$	—	$	158,704
Other deposits		3,246,734		—		3,246,734		—		3,246,734
Subordinated debt		39,554		—		40,404		—		40,404
Accrued interest payable		707		—		707		—		707