Disclosures about Fair Value of Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Disclosures about Fair Value of Assets and Liabilities

Schedule of fair value measurement of assets measured at fair value on recurring basis

	Fair Value Measurements Using
			Quoted Prices in		Significant
			Active Markets		Other		Significant
			for Identical		Observable		Unobservable
	Fair		Assets		Inputs		Inputs
Assets	Value		(Level 1)		(Level 2)		(Level 3)
	(In thousands)
December 31, 2017
Trading securities	$	140,837	$	—	$	140,837	$	—
Available-for-sale securities:
Treasury notes		992		992		—		—
Federal agencies		374,731		—		374,731		—
Municipals		6,688				—		6,688
Mortgage-backed - Government-sponsored entity (GSE) - residential		25,960		—		25,960		—
Mortgage servicing rights		66,079		—		—		66,079
December 31, 2016
Trading securities	$	137,675	$	—	$	137,675	$	—
Available-for-sale securities:
Treasury notes		999		999		—		—
Federal agencies		288,993		—		288,993		—
Municipals		9,500		—		9,500		—
Mortgage-backed - Government-sponsored entity (GSE) - residential		26,382		—		26,382		—
Mortgage servicing rights		53,670		—		—		53,670

Schedule of Level 3 reconciliation of recurring fair value measurements

	Year Ended December 31,
	2017		2016		2015
	(In thousands)
Mortgage servicing rights
Balance, beginning of period	$	53,670	$	55,553	$	52,913
Additions
Purchased servicing		1,209		1,357		1,135
Originated servicing		9,784		4,388		6,866
Acquisition of RICHMAC		3,970		—		—
Subtractions
Paydowns		(5,504)		(4,230)		(5,177)
Changes in fair value due to changes in valuation inputs or assumptions used in the valuation model		2,950		(3,398)		(184)
Balance, end of period	$	66,079	$	53,670	$	55,553
Available-for-sale securities - Municipals
Balance, beginning of period	$	—	$	—	$	—
Additions
Purchased securities		6,688		—		—
Unrealized gains (losses) included in other comprehensive income		—		—		—
Balance, end of period	$	6,688	$	—	$	—

Schedule of fair value measurement of assets and liabilities measured at fair value on nonrecurring basis

	Fair Value Measurements Using
			Quoted Prices in		Significant
			Active Markets		Other		Significant
			for Identical		Observable		Unobservable
	Fair		Assets		Inputs		Inputs
Assets	Value		(Level 1)		(Level 2)		(Level 3)
	(In thousands)
December 31, 2017
Impaired loans (collateral dependent)	$	2,126	$	—	$	—	$	2,126
December 31, 2016
Impaired loans (collateral dependent)	$	225	$	—	$	—	$	225

Schedule of quantitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements other than goodwill

			Valuation
	Fair Value		Technique	Unobservable Inputs	Range
	(In thousands)
At December 31, 2017:
Collateral-dependent impaired loans	$	2,126	Market comparable properties	Marketability discount	5% - 47%
Mortgage servicing rights	$	66,079	Discounted cash flow	Discount rate	8% - 13%
				Constant prepayment rate	1% - 36%
At December 31, 2016:
Collateral-dependent impaired loans	$	225	Market comparable properties	Marketability discount	40%
Mortgage servicing rights	$	53,670	Discounted cash flow	Discount rate	8% - 15%
				Constant prepayment rate	0% - 25%

Schedule of carrying amount and estimated fair value of financial instruments

			Fair Value Measurements Using
					Quoted Prices in		Significant
					Active Markets		Other		Significant
					for Identical		Observable		Unobservable
	Carrying		Fair		Assets		Inputs		Inputs
Assets	Value		Value		(Level 1)		(Level 2)		(Level 3)
	(In thousands)
December 31, 2017
Financial assets:
Cash and cash equivalents	$	359,519	$	359,519	$	359,519	$	—	$	—
Securities purchased under agreements to resell		7,043		7,043		—		7,043		—
FHLB stock		7,539		7,539		—		7,539		—
Loans held for sale		995,319		995,319		—		995,319		—
Loans, net		1,366,349		1,364,568		—		—		1,364,568
Interest receivable		8,326		8,326		—		8,326		—
Financial liabilities:
Deposits		2,943,561		2,943,173		2,534,605		408,568		—
Line of credit		25,000		25,000		—		25,000		—
Short-term subordinated debt		30,000		30,000		—		30,000		—
FHLB advances		1,612		1,620		—		1,620		—
Interest payable		2,817		2,817		—		2,817		—
December 31, 2016
Financial assets:
Cash and cash equivalents	$	445,701	$	445,701	$	445,701	$	—	$	—
Securities purchased under agreements to resell		5,392		5,392		—		5,392		—
FHLB stock		7,539		7,539		—		7,539		—
Loans held for sale		764,503		764,503		—		764,503		—
Loans, net		935,546		935,287		—		—		935,287
Interest receivable		5,368		5,368		—		5,368		—
Financial liabilities:
Deposits		2,428,621		2,428,478		2,262,378		166,100		—
Line of credit		25,000		25,000		—		25,000		—
Short-term subordinated debt		30,000		30,000		—		30,000		—
FHLB advances		2,006		2,031		—		2,031		—
Interest payable		1,791		1,791		—		1,791		—