Territorial Bancorp (TBNK) 10-Q 8 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document and Entity Information
Entity Registrant Name	Territorial Bancorp Inc.
Entity Central Index Key	1447051
Document Type	10-Q
Document Period End Date	31-Mar-15
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		9,719,600
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
ASSETS
Cash and cash equivalents	$45,774	$75,060
Investment securities held to maturity, at amortized cost (fair value of $569,832 and $586,710 at March 31, 2015 and December 31, 2014, respectively)	552,461	572,922
Federal Home Loan Bank stock, at cost	11,112	11,234
Federal Reserve Bank Stock, at cost	2,949	2,925
Loans held for sale	2,910	1,048
Loans receivable, net	1,038,922	968,212
Accrued interest receivable	4,583	4,436
Premises and equipment, net	5,445	5,629
Bank-owned life insurance	41,558	41,303
Deferred income taxes receivable	7,486	7,254
Prepaid expenses and other assets	2,190	1,874
Total assets	1,715,390	1,691,897
Liabilities:
Deposits	1,381,461	1,359,679
Advances from the Federal Home Loan Bank	27,000	15,000
Securities sold under agreements to repurchase	60,000	72,000
Accounts payable and accrued expenses	26,857	24,098
Investment purchases pending settlement	1,166
Current income taxes payable	1,051	826
Advance payments by borrowers for taxes and insurance	2,710	3,916
Total liabilities	1,500,245	1,475,519
Stockholders' Equity:
Preferred stock, $.01 par value; authorized 50,000,000 shares, no shares issued or outstanding
Common stock, $.01 par value; authorized 100,000,000 shares; issued and outstanding 9,720,959 and 9,919,064 shares at March 31, 2015 and December 31, 2014, respectively	97	99
Additional paid-in capital	71,806	75,229
Unearned ESOP shares	-6,728	-6,851
Retained earnings	155,318	153,289
Accumulated other comprehensive loss	-5,348	-5,388
Total stockholders' equity	215,145	216,378
Total liabilities and stockholders' equity	$1,715,390	$1,691,897

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified
Consolidated Balance Sheets
Investment securities held to maturity, fair value (in dollars)	$569,832	$586,710
Preferred stock, par value (in dollars per share)	$0.01	$0.01
Preferred stock, authorized shares	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, authorized shares	100,000,000	100,000,000
Common stock, shares issued	9,720,959	9,919,064
Common stock, shares outstanding	9,720,959	9,919,064

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Interest and dividend income:
Investment securities	$4,523	$5,074
Loans	10,686	9,540
Dividends on FHLB stock	3	3
Other investments	76	40
Total interest and dividend income	15,288	14,657
Interest expense:
Deposits	1,134	1,091
Advances from the Federal Home Loan Bank	70	66
Securities sold under agreements to repurchase	312	343
Total interest expense	1,516	1,500
Net interest income	13,772	13,157
Provision for loan losses	194	9
Net interest income after provision for loan losses	13,578	13,148
Noninterest income:
Service fees on loan and deposit accounts	460	499
Income on bank-owned life insurance	255	268
Gain on sale of investment securities	236	346
Gain on sale of loans	129	79
Other	166	166
Total noninterest income	1,246	1,358
Noninterest expense:
Salaries and employee benefits	5,099	5,363
Occupancy	1,437	1,422
Equipment	945	914
Federal deposit insurance premiums	209	199
Other general and administrative expenses	1,214	966
Total noninterest expense	8,904	8,864
Income before income taxes	5,920	5,642
Income taxes	2,394	2,180
Net income	$3,526	$3,462
Basic earnings per share (in dollars per share)	$0.39	$0.38
Diluted earnings per share (in dollars per share)	$0.38	$0.37
Cash dividends declared per common share (in dollars per share)	$0.16	$0.14
Basic weighted-average shares outstanding (in shares)	9,120,720	9,187,540
Diluted weighted-average shares outstanding (in shares)	9,319,814	9,380,160

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Consolidated Statements of Comprehensive Income
Net income	$3,526	$3,462
Change in unrealized loss on securities	9	3
Noncredit related gains on securities not expected to be sold	31	72
Other comprehensive income, net of tax	40	75
Comprehensive income	$3,566	$3,537

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Common Stock	Additional Paid-in Capital	Unearned ESOP Shares	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
In Thousands, unless otherwise specified
Balance at Dec. 31, 2013	$101	$77,340	($7,340)	$145,826	($3,787)	$212,140
Increase (Decrease) in Stockholders' Equity
Net income				3,462		3,462
Other comprehensive income					75	75
Cash dividends declared ($0.16 per share and $0.14 per share for the three months ended March 31, 2015 and March 31, 2014, respectively)				-1,329		-1,329
Share-based compensation		660				660
Allocation of ESOP shares (12,233 shares for three months ended March 31, 2015 and March 31, 2014)		151	122			273
Repurchase of company common stock (198,105 and 170,994 shares for the three months ended March 31, 2015 and March 31, 2014, respectively)	-2	-3,885				-3,887
Balance at Mar. 31, 2014	99	74,266	-7,218	147,959	-3,712	211,394
Balance at Dec. 31, 2014	99	75,229	-6,851	153,289	-5,388	216,378
Increase (Decrease) in Stockholders' Equity
Net income				3,526		3,526
Other comprehensive income					40	40
Cash dividends declared ($0.16 per share and $0.14 per share for the three months ended March 31, 2015 and March 31, 2014, respectively)				-1,497		-1,497
Share-based compensation		738				738
Allocation of ESOP shares (12,233 shares for three months ended March 31, 2015 and March 31, 2014)		145	123			268
Repurchase of company common stock (198,105 and 170,994 shares for the three months ended March 31, 2015 and March 31, 2014, respectively)	-2	-4,306				-4,308
Balance at Mar. 31, 2015	$97	$71,806	($6,728)	$155,318	($5,348)	$215,145

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Consolidated Statements of Stockholders' Equity, Share Data
Cash dividends declared (in dollars per share)	$0.16	$0.14
Common Stock
Consolidated Statements of Stockholders' Equity, Share Data
Allocation of ESOP shares, shares	12,233	12,233
Repurchase of company common stock, shares	198,105	170,994

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$3,526	$3,462
Adjustments to reconcile net income to net cash from operating activities:
Provision for loan losses	194	9
Depreciation and amortization	339	328
Deferred income tax benefit	-258	-707
Amortization of fees, discounts, and premiums	-73	-106
Origination of loans held for sale	-15,324	-8,590
Proceeds from sales of loans held for sale	13,335	9,862
Gain on sale of loans, net	-129	-79
Purchases of investment securities held for trading		-5,041
Proceeds from sale of investment securities held for trading		5,071
Gain on sale of investment securities held for trading		-30
Gain on sale of investment securities held to maturity	-236	-316
ESOP expense	268	273
Share-based compensation expense	738	660
Increase in accrued interest receivable	-147	-109
Net increase in bank-owned life insurance	-255	-267
Net increase in prepaid expenses and other assets	-316	-325
Net increase (decrease) in accounts payable and accrued expenses	3,125	-2,326
Net decrease in advance payments by borrowers for taxes and insurance	-1,206	-1,291
Net increase (decrease) in income taxes payable	225	-608
Net cash from operating activities	3,806	-130
Cash flows from investing activities:
Purchases of investment securities held to maturity	-1,204	-27,926
Principal repayments on investment securities held to maturity	20,510	14,419
Proceeds from sale of investment securities held to maturity	2,580	3,724
Loan originations, net of principal repayments on loans receivable	-70,532	-15,943
Proceeds from redemption of Federal Home Loan Bank stock	122	110
Purchases of Federal Reserve Bank stock	-24
Purchases of premises and equipment	-155	-330
Net cash from investing activities	-48,703	-25,946
Cash flows from financing activities:
Net increase in deposits	21,782	28,599
Proceeds from advances from the Federal Home Loan Bank	22,000
Repayments of advances from the Federal Home Loan Bank	-10,000
Proceeds from securities sold under agreements to repurchase	25,000
Repayments of securities sold under agreements to repurchase	-37,000
Repurchases of common stock	-4,674	-4,412
Cash dividends paid	-1,497	-1,329
Net cash from financing activities	15,611	22,858
Net decrease in cash and cash equivalents	-29,286	-3,218
Cash and cash equivalents at beginning of the year	75,060	75,365
Cash and cash equivalents at end of the year	45,774	72,147
Cash paid for:
Interest on deposits and borrowings	1,532	1,467
Income taxes	2,350	3,495
Supplemental disclosure of noncash investing and financing activities:
Investments purchased, not yet settled	1,166
Company stock repurchased, not yet settled	$366

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2015
Summary of Significant Accounting Policies
Basis of Presentation
	(1)Basis of Presentation
	The accompanying unaudited consolidated financial statements of Territorial Bancorp Inc. (the Company) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X.  Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations.  These interim condensed consolidated financial statements and notes should be read in conjunction with Territorial Bancorp Inc.’s consolidated financial statements and notes thereto filed as part of the Annual Report on Form 10-K for the year ended December 31, 2014.  In the opinion of management, all adjustments necessary for a fair presentation have been made and include all normal recurring adjustments.  Interim results of operations are not necessarily indicative of results to be expected for the year.

Organization

Organization	3 Months Ended
	Mar. 31, 2015
Organization
Organization
	(2)Organization
	On November 4, 2008, the Board of Directors of Territorial Mutual Holding Company (MHC) approved a plan of conversion and reorganization under which MHC would convert from a mutual holding company to a stock holding company.  The conversion to a stock holding company was approved by the depositors and borrowers of Territorial Savings Bank and the Office of Thrift Supervision (OTS) and included the filing of a registration statement with the U.S. Securities and Exchange Commission.  Upon the completion of the conversion and reorganization on July 10, 2009, Territorial Mutual Holding Company and Territorial Savings Group, Inc. ceased to exist as separate legal entities and Territorial Bancorp Inc. became the holding company for Territorial Savings Bank.
	Upon completion of the conversion and reorganization, a special “liquidation account” was established in an amount equal to the total equity of Territorial Mutual Holding Company as of December 31, 2008.  The liquidation account is to provide eligible account holders and supplemental eligible account holders who maintain their deposit accounts with Territorial Savings Bank after the conversion with a liquidation interest in the unlikely event of the complete liquidation of Territorial Savings Bank after the conversion.  The balance of the liquidation account at December 31, 2014 was $15.2 million.
	On June 25, 2014, Territorial Savings Bank converted from a federal savings bank to a Hawaii state-chartered savings bank.  On July 10, 2014, Territorial Savings Bank became a member of the Federal Reserve System.

Recently_Adopted_Accounting_Pr

Recently Adopted Accounting Pronouncements	3 Months Ended
	Mar. 31, 2015
Recently Adopted Accounting Pronouncements
Recently Adopted Accounting Pronouncements
	(3)Recently Adopted Accounting Pronouncements
	In January 2014, the Financial Accounting Standards Board (FASB) amended the Receivables topic of the FASB Accounting Standards Codification (ASC).  The amendment clarifies when an in substance repossession or foreclosure occurs and when a mortgage loan should be derecognized and the related real property recognized.  The amendment also requires disclosures about the amount of foreclosed residential real property held and the recorded investment in mortgage loans collateralized by residential real property in the process of foreclosure.  The amendment was effective for interim and annual periods beginning after December 15, 2014.  The Company adopted this amendment on January 1, 2015, and the adoption did not have a material effect on its consolidated financial statements.
	In May 2014, the FASB amended the Revenue Recognition topic of the FASB ASC.  The amendment seeks to clarify the principles for recognizing revenue as well as to develop common revenue standards for U.S. generally accepted accounting principles and International Financial Reporting Standards.  The amendment is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period.  Early application is not permitted.  The Company does not expect the adoption of this amendment to have a material effect on its consolidated financial statements.
	In June 2014, the FASB amended the Transfers and Servicing topic of the FASB ASC.  The amendment modifies the accounting for certain types of repurchase transactions as well as adds new disclosure requirements for repurchase transactions.  The amendment was effective for interim and annual periods beginning after December 15, 2014, with early adoption prohibited.  The Company adopted this amendment on January 1, 2015, and the adoption did not have a material effect on its consolidated financial statements.  See Footnote 8, Securities Sold Under Agreements to Repurchase.
	In August 2014, the FASB amended the Receivables topic of the FASB ASC.  The amendment seeks to clarify the classification of foreclosed mortgage loans that are either fully or partially guaranteed under government programs, such as from the Federal Housing Administration (FHA) or the U.S. Department of Veterans Affairs (VA).  The amendment was effective for interim and annual periods beginning after December 15, 2014.  The Company adopted this amendment on January 1, 2015, and the adoption did not have any effect on its consolidated financial statements.
	In April 2015, the FASB amended the Intangibles — Goodwill and Other topic of the FASB ASC.  The amendment adds guidance to help entities evaluate the accounting for fees paid in cloud computing arrangements.  The amendment is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2015.  The Company does not expect the adoption of this amendment to have a material effect on its consolidated financial statements.

Cash_and_Cash_Equivalents

Cash and Cash Equivalents	3 Months Ended
	Mar. 31, 2015
Cash and Cash Equivalents
Cash and Cash Equivalents
	(4)Cash and Cash Equivalents
	The table below presents the balances of cash and cash equivalents:
		March 31,		December 31,
	(Dollars in thousands)	2015		2014
	Cash and due from banks	$	10,388	$	10,803
	Interest-earning deposits in other banks	35,386		64,257
	Cash and cash equivalents	$	45,774	$	75,060
	Interest-earning deposits in other banks consist primarily of deposits at the Federal Reserve Bank.

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2015
Investment Securities
Investment Securities
	(5)Investment Securities
	The amortized cost and fair values of investment securities are as follows:
		Amortized		Gross Unrealized					Estimated
	(Dollars in thousands)	Cost		Gains		Losses			Fair Value
	March 31, 2015:
	Held to maturity:
	U.S. government-sponsored mortgage-backed securities	$	551,720	$	19,718	$	(2,347	)	$	569,091
	Trust preferred securities	741		—		—			741
	Total	$	552,461	$	19,718	$	(2,347	)	$	569,832
	December 31, 2014:
	Held to maturity:
	U.S. government-sponsored mortgage-backed securities	$	572,232	$	18,078	$	(4,290	)	$	586,020
	Trust preferred securities	690		—		—			690
	Total	$	572,922	$	18,078	$	(4,290	)	$	586,710
	The amortized cost and estimated fair value of investment securities at March 31, 2015 are shown below. Incorporated in the maturity schedule are mortgage-backed and trust preferred securities, which are allocated using the contractual maturity as a basis.  Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.
		Amortized		Estimated
	(Dollars in thousands)	Cost		Fair Value
	Held to maturity:
	Due within 5 years	$	46	$	48
	Due after 5 years through 10 years	9		10
	Due after 10 years	552,406		569,774
	Total	$	552,461	$	569,832
	Realized gains and losses and the proceeds from sales of securities held to maturity and trading are shown in the table below.  All sales of securities were U.S. government-sponsored mortgage-backed securities.
		For the Three Months Ended
		March 31,
	(Dollars in thousands)	2015		2014
	Proceeds from sales	$	2,580	$	8,795
	Gross gains	236		346
	Gross losses	—		—
	During the three months ended March 31, 2015, the Company received proceeds of $2.6 million from the sale of $2.3 million of held-to-maturity debt securities, resulting in gross realized gains of $236,000.  During the three months ended March 31, 2014, the Company received proceeds of $3.7 million from the sale of $3.4 million of held-to-maturity debt securities, resulting in gross realized gains of $316,000.  The sale of these securities, for which the Company had already collected a substantial portion of the outstanding principal (at least 85%), is in accordance with the Investments - Debt and Equity Securities topic of the FASB ASC and will not affect the historical cost basis used to account for the remaining securities in the held-to-maturity portfolio.
	Investment securities with amortized costs of $264.0 million and $270.2 million at March 31, 2015 and December 31, 2014, respectively, were pledged to secure public deposits, securities sold under agreements to repurchase and transaction clearing accounts.
	Provided below is a summary of investment securities which were in an unrealized loss position at March 31, 2015 and December 31, 2014.  The Company does not intend to sell these securities until such time as the value recovers or the securities mature and it is not more likely than not that the Company will be required to sell the securities prior to recovery of value or the securities mature.
		Less Than 12 Months				12 Months or Longer					Total
				Unrealized					Unrealized		Number of			Unrealized
	Description of Securities	Fair Value		Losses		Fair Value			Losses		Securities	Fair Value		Losses
	(Dollars in thousands)
	March 31, 2015:
	Mortgage-backed securities	$	120,990	$	1,030	$	57,955		$	1,317	33	$	178,945	$	2,347
	December 31, 2014:
	Mortgage-backed securities	$	12,717	$	65	$	183,349		$	4,225	37	$	196,066	$	4,290
	Mortgage-Backed Securities.  The unrealized losses on the Company’s investment in mortgage-backed securities were caused by increases in market interest rates.  All of the mortgage-backed securities are guaranteed by Freddie Mac or Fannie Mae, which are U.S. government-sponsored enterprises, or Ginnie Mae, which is a U.S. government agency.  Since the decline in market value is attributable to changes in interest rates and not credit quality, and the Company does not intend to sell these investments until maturity and it is not more likely than not that the Company will be required to sell such investments prior to recovery of its cost basis, the Company does not consider these investments to be other-than-temporarily impaired as of March 31, 2015 and December 31, 2014.
	In March 2015, the Company purchased a $1.2 million Ginnie Mae mortgage-backed security for settlement in April 2015.  This security purchase was recorded on the trade date at the expected settlement amount.
	Trust Preferred Securities.  At March 31, 2015, the Company owns two trust preferred securities, PreTSL XXIII and XXIV. The trust preferred securities represent investments in a pool of debt obligations issued primarily by holding companies for Federal Deposit Insurance Corporation-insured financial institutions.  Both of these securities are classified in the Company’s held-to-maturity investment portfolio.
	The trust preferred securities market is considered to be inactive as only five transactions have occurred over the past 39 months in the same tranche of securities owned by the Company.  The Company used a discounted cash flow model to determine whether these securities are other-than-temporarily impaired.  The assumptions used in preparing the discounted cash flow model include the following: estimated discount rates, estimated deferral and default rates on collateral, and estimated cash flows.
	Based on the Company’s review, the Company’s investment in trust preferred securities did not incur additional impairment during the quarter ending March 31, 2015.
	PreTSL XXIV has an amortized cost of $0 at March 31, 2015.  PreTSL XXIII has an amortized cost of $741,000 at March 31, 2015.  The difference between the amortized cost of $741,000 and the remaining cost basis of $1.1 million is reported as other comprehensive loss and is related to noncredit factors.
	It is reasonably possible that the fair values of the trust preferred securities could decline in the near term if the overall economy and the financial condition of some of the issuers continue to deteriorate and the liquidity of these securities remains low.  As a result, there is a risk that the Company’s remaining cost basis of $1.1 million on its trust preferred securities could be credit-related other-than-temporarily impaired in the near term.  The impairment could be material to the Company’s consolidated statements of income.
	The table below provides a cumulative roll forward of credit losses recognized in earnings for debt securities held and not intended to be sold:
	(Dollars in thousands)	2015		2014
	Balance at January 1,	$	5,885	$	5,885
	Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—		—
	Balance at March 31,	$	5,885	$	5,885
	The table below shows the components of comprehensive loss, net of taxes, resulting from other-than-temporarily impaired securities:
		March 31,
	(Dollars in thousands)	2015		2014
	Noncredit losses on other-than-temporarily impaired securities, net of taxes	$	253	$	304

Loans_Receivable_and_Allowance

Loans Receivable and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2015
Loans Receivable and Allowance for Loan Losses
Loans Receivable and Allowance for Loan Losses
	(6)Loans Receivable and Allowance for Loan Losses
	The components of loans receivable are as follows:
		March 31,			December 31,
	(Dollars in thousands)	2015			2014
	Real estate loans:
	First mortgages:
	One- to four-family residential	$	995,241		$	926,074
	Multi-family residential	9,826			8,920
	Construction, commercial, and other	19,092			18,415
	Home equity loans and lines of credit	16,225			15,992
	Total real estate loans	1,040,384			969,401
	Other loans:
	Loans on deposit accounts	245			441
	Consumer and other loans	4,166			4,173
	Total other loans	4,411			4,614
	Less:
	Net unearned fees and discounts	(4,001		)	(4,112		)
	Allowance for loan losses	(1,872		)	(1,691		)
	Total unearned fees, discounts and allowance for loan losses	(5,873		)	(5,803		)
	Loans receivable, net	$	1,038,922		$	968,212
	The table below presents the activity in the allowance for loan losses by portfolio segment:
	(Dollars in thousands)	Residential			Construction,			Home			Consumer			Unallocated			Totals
		Mortgage			Commercial			Equity			and Other
					and Other			Loans and
					Mortgage			Lines of
					Loans			Credit
	Three months ended March 31, 2015:
	Balance, beginning of period	$	413		$	977		$	5		$	263		$	33		$	1,691
	Provision (reversal of allowance) for loan losses	698			(435		)	(2		)	(99		)	32			194
		1,111			542			3			164			65			1,885
	Charge-offs	—			—			—			(19		)	—			(19		)
	Recoveries	—			1			1			4			—			6
	Net charge-offs	—			1			1			(15		)	—			(13		)
	Balance, end of period	$	1,111		$	543		$	4		$	149		$	65		$	1,872
	Three months ended March 31, 2014:
	Balance, beginning of period	$	376		$	799		$	10		$	229		$	72		$	1,486
	Provision (reversal of allowance) for loan losses	58			24			(4		)	(65		)	(4		)	9
		434			823			6			164			68			1,495
	Charge-offs	—			—			—			(17		)	—			(17		)
	Recoveries	—			—			1			6			—			7
	Net charge-offs	—			—			1			(11		)	—			(10		)
	Balance, end of period	$	434		$	823		$	7		$	153		$	68		$	1,485
	During the three months ended March 31, 2015, the Company increased the loan loss provisions for residential mortgage loans based on the growth of this segment of the loan portfolio and the concentration of loans in Hawaii.  The Company also reduced the loan loss provisions on construction, commercial and other mortgage loans and consumer and other loans based on a continued limited loss experience.  The allocation of a portion of the allowance from one category of loans does not preclude its availability to absorb losses in other loan categories.
	Management considers the allowance for loan losses at March 31, 2015 to be at an appropriate level to provide for probable losses that can be reasonably estimated based on general and specific conditions at that date.  While the Company uses the best information it has available to make evaluations, future adjustments to the allowance may be necessary if conditions differ substantially from the information used in making the evaluations.  To the extent actual outcomes differ from the estimates, additional provisions for credit losses may be required that would reduce future earnings.  In addition, as an integral part of their examination process, the bank regulators and the Hawaii Department of Financial Institutions periodically review the allowance for loan losses and may require the Company to increase the allowance based on their analysis of information available at the time of their examination.
	The table below presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method:
	(Dollars in thousands)	Residential			Construction,			Home			Consumer			Unallocated			Totals
		Mortgage			Commercial			Equity			and Other
					and Other			Loans and
					Mortgage			Lines of
					Loans			Credit
	March 31, 2015:
	Allowance for loan losses:
	Ending allowance balance:
	Individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—		$	—
	Collectively evaluated for impairment	1,111			543			4			149			65			1,872
	Total ending allowance balance	$	1,111		$	543		$	4		$	149		$	65		$	1,872
	Loans:
	Ending loan balance:
	Individually evaluated for impairment	$	6,179		$	—		$	132		$	—		$	—		$	6,311
	Collectively evaluated for impairment	994,906			19,063			16,099			4,415			—			1,034,483
	Total ending loan balance	$	1,001,085		$	19,063		$	16,231		$	4,415		$	—		$	1,040,794
	December 31, 2014:
	Allowance for loan losses:
Ending allowance balance:
Individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—		$	—
Collectively evaluated for impairment	413			977			5			263			33			1,691
Total ending allowance balance	$	413		$	977		$	5		$	263		$	33		$	1,691
Loans:
Ending loan balance:
Individually evaluated for impairment	$	6,158		$	—		$	296		$	4		$	—		$	6,458
Collectively evaluated for impairment	924,732			18,399			15,702			4,612			—			963,445
Total ending loan balance	$	930,890		$	18,399		$	15,998		$	4,616		$	—		$	969,903
The table below presents the balance of impaired loans individually evaluated for impairment by class of loans:
(Dollars in thousands)	Recorded			Unpaid
	Investment			Principal
				Balance
March 31, 2015:
With no related allowance recorded:
One- to four-family residential mortgages	$	6,179		$	6,845
Home equity loans and lines of credit	132			162
Total	$	6,311		$	7,007
December 31, 2014:
With no related allowance recorded:
One- to four-family residential mortgages	$	6,158		$	6,775
Home equity loans and lines of credit	296			324
Consumer and other	4			4
Total	$	6,458		$	7,103
The table below presents the average recorded investment and interest income recognized on impaired loans by class of loans:
	For the Three Months Ended
	March 31,
(Dollars in thousands)	Average			Interest
	Recorded			Income
	Investment			Recognized
2015:00:00
With no related allowance recorded:
One- to four-family residential mortgages	$	6,216		$	30
Home equity loans and lines of credit	134			—
Total	$	6,350		$	30
2014:00:00
With no related allowance recorded:
One- to four-family residential mortgages	$	7,248		$	32
Home equity loans and lines of credit	158			—
Total	$	7,406		$	32
There were no loans individually evaluated for impairment with a related allowance for loan loss as of March 31, 2015 or December 31, 2014.  Loans individually evaluated for impairment do not have an allocated allowance for loan loss because they are written down to fair value.
The table below presents the aging of loans and accrual status by class of loans:
(Dollars in thousands)	30 — 59			60 — 89			90 Days or			Total Past			Loans Not			Total			Nonaccrual		Loans
	Days Past			Days Past			Greater			Due			Past Due			Loans			Loans		More
	Due			Due			Past Due														Than 90
																					Days Past
																					Due and
																					Still
																					Accruing
March 31, 2015:
One- to four-family residential mortgages	$	894		$	580		$	842		$	2,316		$	988,974		$	991,290		$	4,183	$	—
Multi-family residential mortgages	—			—			—			—			9,795			9,795			—		—
Construction, commercial and other mortgages	—			—			—			—			19,063			19,063			—		—
Home equity loans and lines of credit	83			—			—			83			16,148			16,231			132		—
Loans on deposit accounts	—			—			—			—			245			245			—		—
Consumer and other	2			—			—			2			4,168			4,170			—		—
Total	$	979		$	580		$	842		$	2,401		$	1,038,393		$	1,040,794		$	4,315	$	—
December 31, 2014:
One- to four-family residential mortgages	$	1,040		$	736		$	593		$	2,369		$	919,624		$	921,993		$	4,153	$	—
Multi-family residential mortgages	—			—			—			—			8,897			8,897			—		—
Construction, commercial and other mortgages	—			—			—			—			18,399			18,399			—		—
Home equity loans and lines of credit	—			—			161			161			15,837			15,998			296		—
Loans on deposit accounts	—			—			—			—			440			440			—		—
Consumer and other	7			1			4			12			4,164			4,176			4		—
Total	$	1,047		$	737		$	758		$	2,542		$	967,361		$	969,903		$	4,453	$	—
The Company primarily uses the aging of loans and accrual status to monitor the credit quality of its loan portfolio.  When a mortgage loan becomes seriously delinquent (90 days or more contractually past due), it displays weaknesses that may result in a loss. As a loan becomes more delinquent, the likelihood of the borrower repaying the loan decreases and the loan becomes more collateral-dependent.  A mortgage loan becomes collateral-dependent when the proceeds for repayment can be expected to come only from the sale or operation of the collateral and not from borrower repayments.  Generally, appraisals are obtained after a loan becomes collateral-dependent or is five months delinquent.  The carrying value of collateral-dependent loans is adjusted to the fair value of the collateral less selling costs.  Any commercial real estate, commercial, construction or equity loan that has a loan balance in excess of a specified amount is also periodically reviewed to determine whether the loan exhibits any weaknesses and is performing in accordance with its contractual terms.
The Company had 17 nonaccrual loans with a book value of $4.3 million at March 31, 2015 and 18 nonaccrual loans with a book value of $4.5 million as of December 31, 2014.  The Company collected interest on nonaccrual loans of $50,000 and $52,000 during the three months ended March 31, 2015 and 2014, respectively, but due to regulatory requirements, the Company recorded the interest as a reduction of principal.  The Company would have recognized additional interest income of $66,000 and $70,000 during the three months ended March 31, 2015 and 2014, respectively, had the loans been accruing interest.  The Company did not have any loans more than 90 days past due and still accruing interest as of March 31, 2015 or December 31, 2014.
There were no loans modified in a troubled debt restructuring during the three months ended March 31, 2015 or 2014. There were no new troubled debt restructurings within the past 12 months that subsequently defaulted.
The Company had 17 troubled debt restructurings totaling $4.5 million as of March 31, 2015 that were considered to be impaired.  This total included 16 one- to four-family residential mortgage loans totaling $4.4 million and one home equity loan for $132,000.  Six of the loans, totaling $2.0 million, were performing in accordance with their restructured terms and accruing interest at March 31, 2015.  Nine of the loans, totaling $2.2 million, were performing in accordance with their restructured terms but not accruing interest at March 31, 2015.  Two of the loans, totaling $342,000, are delinquent and not accruing interest at March 31, 2015.  The Company had 17 troubled debt restructurings totaling $4.6 million as of December 31, 2014 that were considered to be impaired.  This total included 16 one- to four-family residential mortgage loans totaling $4.4 million and one home equity loan for $135,000.  Six of the loans, totaling $2.0 million, were performing in accordance with their restructured terms and accruing interest at December 31, 2014.  Nine of the loans, totaling $2.2 million, were performing in accordance with their restructured terms but not accruing interest at December 31, 2014.  Two of the loans, totaling $343,000, are delinquent and not accruing interest at December 31, 2014.  Restructurings include deferrals of interest and/or principal payments and temporary or permanent reductions in interest rates due to the financial difficulties of the borrowers.  We have no commitments to lend any additional funds to these borrowers.
The Company had no real estate owned as of March 31, 2015 and 2014.  There were three one- to four-family residential mortgage loans totaling $691,000 in process of foreclosure as of March 31, 2015, and three one- to four-family residential mortgage loans totaling $1.0 million in process of foreclosure as of March 31, 2014.
Nearly all of our real estate loans are collateralized by real estate located in the State of Hawaii.  Loan-to-value ratios on these real estate loans generally do not exceed 80% at the time of origination.
During the three months ended March 31, 2015 and 2014, the Company sold $13.3 million and $9.9 million, respectively, of mortgage loans held for sale and recognized gains of $129,000 and $79,000, respectively.  The Company had nine loans held for sale totaling $2.9 million at March 31, 2015 and six loans held for sale totaling $1.0 million at December 31, 2014.
The Company serviced loans for others of $59.0 million at March 31, 2015 and $60.5 million at December 31, 2014. Of these amounts, $2.9 million and $3.0 million relate to securitizations for which the Company continues to hold the related mortgage-backed securities at March 31, 2015 and December 31, 2014, respectively.  The amount of contractually specified servicing fees earned for the three-month periods ended March 31, 2015 and 2014 was $41,000 and $47,000, respectively.  The fees are reported in service fees on loan and deposit accounts in the consolidated statements of income.

Advances_from_the_Federal_Home

Advances from the Federal Home Loan Bank	3 Months Ended
	Mar. 31, 2015
Advances from the Federal Home Loan Bank
Advances from the Federal Home Loan Bank
	(7)Advances from the Federal Home Loan Bank
	The FHLB advances are secured by a blanket pledge on the Bank’s assets not otherwise pledged. At March 31, 2015 and 2014, the Company had available additional unused FHLB advances of approximately $396.0 million and $389.2 million, respectively.
	Advances outstanding consisted of the following:
		March 31, 2015			December 31, 2014
				Weighted			Weighted
				Average			Average
	(Dollars in thousands)	Amount		Rate	Amount		Rate
	Due within one year	$	—	—%	$	10,000	2.06%
	Due over 3 years to 4 years	27,000		1.57	5,000		1.2
	Total	$	27,000	1.57%	$	15,000	1.77%

Securities_Sold_Under_Agreemen

Securities Sold Under Agreements to Repurchase	3 Months Ended
	Mar. 31, 2015
Securities Sold Under Agreements to Repurchase
Securities Sold Under Agreements to Repurchase
	(8)Securities Sold Under Agreements to Repurchase
	Securities sold under agreements to repurchase are treated as financings and the obligations to repurchase the identical securities sold are reflected as a liability with the dollar amount of securities underlying the agreements remaining in the asset accounts.  Securities sold under agreements to repurchase are summarized as follows:
		March 31, 2015				December 31, 2014
				Weighted					Weighted
		Repurchase		Average		Repurchase			Average
	(Dollars in thousands)	Liability		Rate		Liability			Rate
	Maturing:
	1 year or less	$	10,000	1.94%		$	47,000		2.11%
	Over 2 years to 3 years	25,000		1.46		25,000			1.46
	Over 3 years to 4 years	20,000		1.66		—			—
	Over 4 years to 5 years	5,000		1.65		—			—
	Total	$	60,000	1.62%		$	72,000		1.88%
	Below is a summary comparing the carrying value and fair value of securities pledged to secure repurchase agreements, the repurchase liability, and the amount at risk at March 31, 2015.  The amount at risk is the greater of the carrying value or fair value over the repurchase liability.  All the agreements to repurchase are with JP Morgan Securities and the securities pledged are mortgage-backed securities issued and guaranteed by U.S. government-sponsored enterprises.  The repurchase liability cannot exceed 90% of the fair value of securities pledged.  In the event of a decline in the fair value of securities pledged to less than the required amount due to market conditions or principal repayments, the Company is obligated to pledge additional securities or other suitable collateral to cure the deficiency.
												Weighted
		Carrying		Fair								Average
		Value of		Value of			Repurchase			Amount		Months to
	(Dollars in thousands)	Securities		Securities			Liability			at Risk		Maturity
	Maturing:
	Over 90 days	$	76,542	$	78,232		$	60,000		$	18,232	34

Offsetting_of_Financial_Liabil

Offsetting of Financial Liabilities	3 Months Ended
	Mar. 31, 2015
Offsetting of Financial Liabilities
Offsetting of Financial Liabilities
	(9)Offsetting of Financial Liabilities
	Securities sold under agreements to repurchase are subject to a conditional right of offset in the event of default.  See Footnote 8, Securities Sold Under Agreements to Repurchase, for additional information.
		Gross Amount		Gross Amount		Net Amount of		Gross Amount Not Offset in the
						Liabilities		Balance Sheet
	(Dollars in thousands)	of Recognized		Offset in the		Presented in the		Financial		Cash Collateral		Net Amount
		Liabilities		Balance Sheet		Balance Sheet		Instruments		Pledged
	March 31, 2015:
	Securities sold under agreements to repurchase	$	60,000	$	—	$	60,000	$	60,000	$	—	$	—
	December 31, 2014:
	Securities sold under agreements to repurchase	$	72,000	$	—	$	72,000	$	72,000	$	—	$	—

Employee_Benefit_Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2015
Employee Benefit Plans
Employee Benefit Plans
	(10)Employee Benefit Plans
	The Company has a noncontributory defined benefit pension plan (Pension Plan) that covers most employees with at least one year of service.  Effective December 31, 2008, under approved changes to the Pension Plan, there were no further accruals of benefits for any participants and benefits will not increase with any additional years of service.  Net periodic benefit cost, subsequent to December 31, 2008, has not been significant and is not disclosed in the table below.
	The Company also sponsors a Supplemental Employee Retirement Plan (SERP), a noncontributory supplemental retirement benefit plan, which covers certain current and former employees of the Company for amounts in addition to those provided under the Pension Plan.
	The components of net periodic benefit cost were as follows:
		SERP
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015		2014
	Net periodic benefit cost for the period
	Service cost	$	21	$	25
	Interest cost	31		30
	Expected return on plan assets	—		—
	Amortization of prior service cost	—		—
	Recognized actuarial loss	—		—
	Recognized curtailment loss	—		—
	Net periodic benefit cost	$	52	$	55

Employee_Stock_Ownership_Plan

Employee Stock Ownership Plan (Employee Stock Ownership Plan)	3 Months Ended
	Mar. 31, 2015
Employee Stock Ownership Plan
Employee Stock Ownership Plan
Employee Stock Ownership Plan
	(11)Employee Stock Ownership Plan
	Effective January 1, 2009, Territorial Savings Bank adopted an Employee Stock Ownership Plan (ESOP) for eligible employees.  The ESOP borrowed $9.8 million from the Company and used those funds to acquire 978,650 shares, or 8%, of the total number of shares issued by the Company in its initial public offering.  The shares were acquired at a price of $10.00 per share.
	The loan is secured by the shares purchased with the loan proceeds and will be repaid by the ESOP over the 20-year term of the loan with funds from Territorial Savings Bank’s contributions to the ESOP and dividends payable on the shares.  The interest rate on the ESOP loan is an adjustable rate equal to the prime rate, as published in The Wall Street Journal.  The interest rate adjusts annually and will be the prime rate on the first business day of the calendar year.
	Shares purchased by the ESOP are held by a trustee in an unallocated suspense account, and shares are released annually from the suspense account on a pro-rata basis as principal and interest payments are made by the ESOP to the Company.  The trustee allocates the shares released among participants on the basis of each participant’s proportional share of compensation relative to all participants.  As shares are committed to be released from the suspense account, Territorial Savings Bank reports compensation expense based on the average fair value of shares released with a corresponding credit to stockholders’ equity.  The shares committed to be released are considered outstanding for earnings per share computations.  Compensation expense recognized for the three months ended March 31, 2015 and 2014 amounted to $222,000 and $240,000, respectively.
	Shares held by the ESOP trust were as follows:
		March 31,		December 31,
		2015		2014
	Allocated shares	295,614		283,381
	Unearned shares	672,824		685,057
	Total ESOP shares	968,438		968,438
	Fair value of unearned shares, in thousands	$	15,986	$	14,763
	The ESOP restoration plan is a nonqualified plan that provides supplemental benefits to certain executives who are prevented from receiving the full benefits contemplated by the employee stock ownership plan’s benefit formula.  The supplemental cash payments consist of payments representing shares that cannot be allocated to the participants under the ESOP due to IRS limitations imposed on tax-qualified plans.  We accrue for these benefits over the period during which employees provide services to earn these benefits.  For the three months ended March 31, 2015 and 2014, we accrued $64,000 and $74,000, respectively, for the ESOP restoration plan.

ShareBased_Compensation

Share-Based Compensation (2010 Equity Incentive Plan)	3 Months Ended
	Mar. 31, 2015
2010 Equity Incentive Plan
Share-Based Compensation
Share-Based Compensation
	(12)Share-Based Compensation
	On August 19, 2010, Territorial Bancorp Inc. adopted the 2010 Equity Incentive Plan, which provides for awards of stock options and restricted stock to key officers and outside directors.  In accordance with the Compensation — Stock Compensation topic of the FASB ASC, the cost of the 2010 Equity Incentive Plan is based on the fair value of the awards on the grant date.  The fair value of restricted stock is based on the closing price of the Company’s stock on the grant date.  The fair value of stock options is estimated using a Black-Scholes option pricing model using assumptions for dividend yield, stock price volatility, risk-free interest rate and option term.  These assumptions are based on our judgments regarding future events, are subjective in nature, and cannot be determined with precision.  The cost of the awards is being recognized on a straight-line basis over the five- or six-year vesting period during which participants are required to provide services in exchange for the awards.
	The Company recognized compensation expense, measured as the fair value of the share-based award on the date of grant, on a straight-line basis over the vesting period. Share-based compensation is recorded in the statement of income as a component of salaries and employee benefits with a corresponding increase in shareholders’ equity. The table below presents information on compensation expense and the related tax benefit for all share-based awards:
		For the Three Months Ended
		March 31,
	(In thousands)	2015			2014
	Compensation expense	$	660		$	660
	Income tax benefit	265			313
	Shares of our common stock issued under the 2010 Equity Incentive Plan shall be authorized but unissued shares. The maximum number of shares that will be awarded under the plan will be 1,712,637 shares.
	Stock Options
	The table below presents the stock option activity for the three months ended March 31, 2015 and 2014:
		Options		Weighted			Remaining	Aggregate
				Average			Contractual	Intrinsic
				Exercise			Life (Years)	Value
				Price				(in thousands)
	Options outstanding at December 31, 2014	832,954		$	17.38		5.68	$	3,471
	Granted	—		—			—	—
	Exercised	—		—			—	—
	Forfeited	—		—			—	—
	Expired	—		—			—	—
	Options outstanding at March 31, 2015	832,954		$	17.38		5.43	$	5,312
	Options outstanding at December 31, 2013	832,954		$	17.38		6.68	$	4,845
	Granted	—		—			—	—
	Exercised	—		—			—	—
	Forfeited	—		—			—	—
	Expired	—		—			—	—
	Options outstanding at March 31, 2014	832,954		$	17.38		6.43	$	3,512
	Options vested and exercisable at March 31, 2015	555,097		$	17.38		5.43	$	3,541
	No stock options vested during the three months ended March 31, 2015 or 2014.
	As of March 31, 2015, the Company had $1.0 million of unrecognized compensation costs related to the stock option plan. The cost of the stock option plan is being amortized over the five- to six-year vesting period.
	Restricted Stock Awards
	Restricted stock awards are accounted for as fixed grants using the fair value of the Company’s stock at the time of grant.  Unvested restricted stock awards may not be disposed of or transferred during the vesting period.  Restricted stock awards carry with them the right to receive dividends.
	The table below presents the restricted stock award activity:
		Restricted		Weighted
		Stock		Average
		Awards		Grant
				Date Fair
				Value
	Nonvested at December 31, 2014	226,733		$	17.39
	Granted	—		—
	Vested	—		—
	Forfeited	—		—
	Nonvested at March 31, 2015	226,733		$	17.39
	Nonvested at December 31, 2013	340,065		$	17.39
	Granted	—		—
	Vested	—		—
	Forfeited	—		—
	Nonvested at March 31, 2014	340,065		$	17.39
	As of March 31, 2015, the Company had $2.8 million of unrecognized compensation cost related to restricted stock awards.  The cost of the restricted stock awards is being amortized over the five- or six-year vesting period.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share
Earnings Per Share
	(13)Earnings Per Share
	The table below presents the information used to compute basic and diluted earnings per share:
		Three Months Ended
		March 31,
	(Dollars in thousands, except share data)	2015		2014
	Net income	$	3,526	$	3,462
	Weighted-average number of shares used in:
	Basic earnings per share	9,120,720		9,187,540
	Dilutive common stock equivalents:
	Stock options and restricted stock units	199,094		192,620
	Diluted earnings per share	9,319,814		9,380,160
	Net income per common share, basic	$	0.39	$	0.38
	Net income per common share, diluted	$	0.38	$	0.37
	We have two forms of our outstanding common stock: common stock and unvested restricted stock awards. Holders of unvested restricted stock awards receive non-forfeitable dividends at the same rate as common shareholders and they both share equally in undistributed earnings. The computed basic and diluted earnings per share presented are substantially equivalent using both the two-class and the treasury stock methods of calculating earnings per share.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	3 Months Ended
	Mar. 31, 2015
Other Comprehensive Loss
Accumulated Other Comprehensive Loss
	(14)Accumulated Other Comprehensive Loss
	The table below presents the changes in the components of accumulated other comprehensive loss, net of taxes:
	(Dollars in thousands)	Unfunded			Noncredit		Unrealized		Total
		Pension			Related		Loss on
		Liability			Losses on		Securities
					Securities
					Not
					Expected to
					Be Sold
	Balances at December 31, 2014	$	5,032		284		72		$	5,388
	Other comprehensive income, net of taxes	—			(31	)	(9	)	(40		)
	Amounts reclassified from accumulated other comprehensive loss	—			—		—		—
	Net current period other comprehensive income	—			(31	)	(9	)	(40		)
	Balances at March 31, 2015	$	5,032		253		63		$	5,348
	Balances at December 31, 2013	$	3,338		376		73		$	3,787
	Other comprehensive income, net of taxes	—			(72	)	(3	)	(75		)
	Amounts reclassified from accumulated other comprehensive loss	—			—		—		—
	Net current period other comprehensive income	—			(72	)	(3	)	(75		)
	Balances at March 31, 2014	$	3,338		304		70		$	3,712
	The table below presents the tax effect on each component of other comprehensive loss:
		March 31,
		2015									2014
	(Dollars in thousands)	Pretax			Tax			After Tax			Pretax			Tax		After Tax
		Amount						Amount			Amount					Amount
	Unfunded pension liability	$	—		$	—		$	—		$	—		$	—	$	—
	Noncredit related losses on securities not expected to be sold	(51		)	20			(31		)	(118		)	46		(72		)
	Unrealized loss on securities	(15		)	6			(9		)	(5		)	2		(3		)
	Total	$	(66	)	$	26		$	(40	)	$	(123	)	$	48	$	(75	)

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2015
Fair Value of Financial Instruments
Fair Value of Financial Instruments
	(15)Fair Value of Financial Instruments
	In accordance with the Fair Value Measurements and Disclosures topic of the FASB ASC, the Company groups its financial assets and liabilities at fair value into three levels based on the markets in which the financial assets and liabilities are traded and the reliability of the assumptions used to determine fair value as follows:
		·		Level 1 — Valuation is based upon quoted prices (unadjusted) for identical assets or liabilities traded in active markets. A quoted price in an active market provides the most reliable evidence of fair value and shall be used to measure fair value whenever available.
		·		Level 2 — Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
		·		Level 3 — Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect management’s own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of discounted cash flow models and similar techniques that require the use of significant judgment or estimation.
	In accordance with the Fair Value Measurements and Disclosures topic, the Company bases its fair values on the price that it would expect to receive if an asset were sold or the price that it would expect to pay to transfer a liability in an orderly transaction between market participants at the measurement date.  Also as required, the Company maximizes the use of observable inputs and minimizes the use of unobservable inputs when developing fair value measurements.
	The Company uses fair value measurements to determine fair value disclosures.  Investment securities held for sale and derivatives are recorded at fair value on a recurring basis.  From time to time, the Company may be required to record other financial assets at fair value on a nonrecurring basis, such as loans held for sale, impaired loans and investments, and mortgage servicing assets. These nonrecurring fair value adjustments typically involve application of the lower of cost or fair value accounting or write-downs of individual assets.
	Cash and Cash Equivalents, Accrued Interest Receivable, Accounts Payable and Accrued Expenses, Investment Purchases Pending Settlement, Current Income Taxes Payable, and Advance Payments by Borrowers for Taxes and Insurance. The carrying amount approximates fair value because of the short maturity of these instruments.
	Investment Securities.  The estimated fair values of U.S. government-sponsored mortgage-backed securities are considered Level 2 inputs because the valuation for investment securities utilized pricing models that varied based on asset class and included trade, bid and other observable market information.
	The trust preferred securities represent investments in a pool of debt obligations issued primarily by holding companies for Federal Deposit Insurance Corporation-insured financial institutions.  The trust preferred securities market is considered to be inactive as only five transactions have occurred over the past 39 months in the same tranche of securities we own and no new issues of pooled trust preferred securities have occurred since 2007.  The fair value of our trust preferred securities was determined using a discounted cash flow model.  Our model used a discount rate equal to three-month LIBOR plus 20.00% and provided a fair value estimate of $20.93 per $100 of par value for PreTSL XXIII.
	The discounted cash flow analysis included a review of all issuers within the pool.  The fair value of the trust preferred securities are classified as Level 3 inputs because they are based on discounted cash flow models.
	FHLB Stock. FHLB stock, which is redeemable for cash at par value, is reported at its par value.
	FRB Stock. FRB stock, which is redeemable for cash at par value, is reported at its par value.
	Loans. The fair value of loans is estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities.  The fair value of loans is not based on the concept of exit price.
	Loans Held for Sale.  The fair value of loans held for sale is determined based on the prices quoted in the secondary market for similar loans.
	Deposits. The fair value of checking and Super NOW savings accounts, passbook accounts, and certain money market deposits is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated by discounting future cash flows using the rates currently offered for deposits with similar remaining maturities.
	Advances From the FHLB and Securities Sold Under Agreements to Repurchase. Fair value is estimated by discounting future cash flows using the rates currently offered to the Company for debt with similar remaining maturities.
	Interest Rate Contracts.  The Company may enter into interest rate lock commitments with borrowers on loans intended to be sold.  To manage interest rate risk on the lock commitments, the Company may also enter into forward loan sale commitments.  The interest rate lock commitments and forward loan sale commitments are treated as derivatives and are recorded at their fair value determined by referring to prices quoted in the secondary market for similar contracts.  Interest rate contracts that are classified as assets are included with prepaid expenses and other assets on the consolidated balance sheet while interest rate contracts that are classified as liabilities are included with accounts payable and accrued expenses.
	The estimated fair values of the Company’s financial instruments are as follows:
			Carrying					Fair Value Measurements Using
	(Dollars in thousands)		Amount		Fair Value			Level 1		Level 2			Level 3
	March 31, 2015
	Assets
	Cash and cash equivalents		$	45,774	$	45,774		$	45,774	$	—		$	—
	Investment securities held to maturity		552,461		569,832			—		569,091			741
	FHLB stock		11,112		11,112			—		11,112			—
	FRB stock		2,949		2,949			—		2,949			—
	Loans held for sale		2,910		2,978			—		2,978			—
	Loans receivable, net		1,038,922		1,070,980			—		—			1,070,980
	Accrued interest receivable		4,583		4,583			4,583		—			—
	Interest rate contracts		113		113			—		113			—
	Liabilities
	Deposits		1,381,461		1,382,097			1,158,355		—			223,742
	Advances from the Federal Home Loan Bank		27,000		27,312			—		27,312			—
	Securities sold under agreements to repurchase		60,000		60,607			—		60,607			—
	Accounts payable and accrued expenses (excluding interest rate contracts)		26,756		26,756			26,756		—			—
	Interest rate contracts		101		101			—		101			—
	Investment purchases pending settlement		1,116		1,116			1,116		—			—
	Current income taxes payable		1,051		1,051			1,051		—			—
	Advance payments by borrowers for taxes and insurance		2,710		2,710			2,710		—			—
	December 31, 2014
	Assets
	Cash and cash equivalents		$	75,060	$	75,060		$	75,060	$	—		$	—
	Investment securities held to maturity		572,922		586,710			—		586,020			690
	FHLB stock		11,234		11,234			—		11,234			—
	FRB stock		2,925		2,925			—		2,925			—
	Loans held for sale		1,048		1,079			—		1,079			—
	Loans receivable, net		968,212		998,183			—		—			998,183
	Accrued interest receivable		4,436		4,436			4,436		—			—
	Interest rate contracts		62		62			—		62			—
	Liabilities
	Deposits		1,359,679		1,360,074			1,137,942		—			222,132
	Advances from the Federal Home Loan Bank		15,000		14,977			—		—			14,977
	Securities sold under agreements to repurchase		72,000		72,334			—		—			72,334
	Accounts payable and accrued expenses (excluding interest rate contracts)		24,044		24,044			24,044		—			—
	Interest rate contracts		54		54			—		54			—
	Current income taxes payable		826		826			826		—			—
	Advance payments by borrowers for taxes and insurance		3,916		3,916			3,916		—			—
	At March 31, 2015 and December 31, 2014, neither the commitment fees received on commitments to extend credit nor the fair value thereof was material to the consolidated financial statements of the Company.
	The table below presents the balance of assets and liabilities measured at fair value on a recurring basis as of March 31, 2015 and December 31, 2014:
	(Dollars in thousands)		Level 1		Level 2			Level 3		Total
	March 31, 2015
	Interest rate contracts — assets		$	—	$	113		$	—	$	113
Interest rate contracts — liabilities		—		(101		)	—		(101		)
December 31, 2014
Interest rate contracts — assets		$	—	$	62		$	—	$	62
Interest rate contracts — liabilities		—		(54		)	—		(54		)
The fair value of interest rate contracts was determined by referring to prices quoted in the secondary market for similar contracts.
The table below presents the balance of assets measured at fair value on a nonrecurring basis as of March 31, 2015 and December 31, 2014 and the related gains and losses for the three months ended March 31, 2015 and the year ended December 31, 2014:
(Dollars in thousands)		Level 1		Level 2			Level 3		Total			Total
												Gains
												(Losses)
March 31, 2015:
Trust preferred securities		$	—	$	—		$	741	$	741		$	51
Mortgage servicing assets		—		—			479		479			(8		)
December 31, 2014:
Impaired loans		$	—	$	—		$	327	$	327		$	(4	)
Trust preferred securities		—		—			690		690			153
Mortgage servicing assets		—		—			505		505			(15		)
The fair value of impaired loans that are considered to be collateral dependent is determined using the value of collateral less estimated selling costs.  The fair value of impaired loans not considered to be collateral dependent is determined using a discounted cash flow analysis.  Assumptions used in the analysis include the discount rate and projected cash flows.  Changes in the measurement of impaired loans are included in the provision for loan losses in the consolidated statements of income.  The fair value of trust preferred securities is determined using a discounted cash flow model.  The assumptions used in the discounted cash flow model are discussed above.  Gains and losses on trust preferred securities that are credit related are included in net other-than-temporary impairment losses in the consolidated statements of income.  Gains and losses on trust preferred securities that are not credit related are included in other comprehensive income in the consolidated statements of comprehensive income.  Mortgage servicing assets are valued using a discounted cash flow model.  Assumptions used in the model include mortgage prepayment speeds, discount rates and cost of servicing.  Losses on mortgage servicing assets are included in service fees on loan and deposit accounts in the consolidated statements of income.
The table below presents the significant unobservable inputs for Level 3 nonrecurring fair value measurements:
(Dollars in thousands)		Fair Value		Valuation Technique		Unobservable		Value
						Input
March 31, 2015:
Trust preferred securities		$	741	Discounted cash flow		Discount rate		Three-month LIBOR plus 20%
Mortgage servicing assets		479		Discounted cash flow		Discount rate		10.00%
						Prepayment speed (PSA)		169.8 – 299.3
						Annual cost to service (per loan)		$60
December 31, 2014:
Impaired loans — non-collateral dependent		$	327	Discounted cash flow		Discount rate (1)		6.10%
Trust preferred securities		690		Discounted cash flow		Discount rate		Three-month LIBOR plus 20%
Mortgage servicing assets		505		Discounted cash flow		Discount rate		10.50%
						Prepayment speed (PSA)		164.8 – 262.5
						Annual cost to service (per loan)		$55
	-1		Represents the yield on contractual cash flows prior to modification in troubled debt restructurings.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2015
Subsequent Events
Subsequent Events
	(16)Subsequent Events
	On April 30, 2015, the Board of Directors of Territorial Bancorp Inc. declared a quarterly cash dividend of $0.16 per share of common stock.  The dividend is expected to be paid on May 28, 2015 to stockholders of record as of May 14, 2015.

Cash_and_Cash_Equivalents_Tabl

Cash and Cash Equivalents (Tables)	3 Months Ended
	Mar. 31, 2015
Cash and Cash Equivalents
Schedule of balances cash and cash equivalents
		March 31,		December 31,
	(Dollars in thousands)	2015		2014
	Cash and due from banks	$	10,388	$	10,803
	Interest-earning deposits in other banks	35,386		64,257
	Cash and cash equivalents	$	45,774	$	75,060

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investment Securities
Schedule of amortized cost and fair values of investment securities
		Amortized		Gross Unrealized						Estimated
	(Dollars in thousands)	Cost		Gains			Losses			Fair Value
	March 31, 2015:
	Held to maturity:
	U.S. government-sponsored mortgage-backed securities	$	551,720	$	19,718		$	(2,347	)	$	569,091
	Trust preferred securities	741		—			—			741
	Total	$	552,461	$	19,718		$	(2,347	)	$	569,832
	December 31, 2014:
	Held to maturity:
	U.S. government-sponsored mortgage-backed securities	$	572,232	$	18,078		$	(4,290	)	$	586,020
	Trust preferred securities	690		—			—			690
	Total	$	572,922	$	18,078		$	(4,290	)	$	586,710
Schedule of carrying and estimated fair value of investment securities by contractual maturity
		Amortized		Estimated
	(Dollars in thousands)	Cost		Fair Value
	Held to maturity:
	Due within 5 years	$	46	$	48
	Due after 5 years through 10 years	9		10
	Due after 10 years	552,406		569,774
	Total	$	552,461	$	569,832
Schedule of realized gains and losses and proceeds from sales of securities available for sale, held to maturity and trading
		For the Three Months Ended
		March 31,
	(Dollars in thousands)	2015		2014
	Proceeds from sales	$	2,580	$	8,795
	Gross gains	236		346
	Gross losses	—		—
Summary of investment securities which were in unrealized loss position
		Less Than 12 Months					12 Months or Longer					Total
				Unrealized						Unrealized		Number of			Unrealized
	Description of Securities	Fair Value		Losses			Fair Value			Losses		Securities	Fair Value		Losses
	(Dollars in thousands)
	March 31, 2015:
	Mortgage-backed securities	$	120,990	$	1,030		$	57,955		$	1,317	33	$	178,945	$	2,347
	December 31, 2014:
	Mortgage-backed securities	$	12,717	$	65		$	183,349		$	4,225	37	$	196,066	$	4,290
Cumulative roll forward of credit losses recognized in earnings for debt securities held and not intended to be sold
	(Dollars in thousands)	2015		2014
	Balance at January 1,	$	5,885	$	5,885
	Credit losses on debt securities for which other-than-temporary impairment was not previously recognized	—		—
	Balance at March 31,	$	5,885	$	5,885
Comprehensive loss
Schedule of components of comprehensive loss, net of taxes
	(Dollars in thousands)	Unfunded		Noncredit		Unrealized		Total
		Pension		Related		Loss on
		Liability		Losses on		Securities
				Securities
				Not
				Expected to
				Be Sold
	Balances at December 31, 2014	$	5,032	284		72		$	5,388
	Other comprehensive income, net of taxes	—		(31	)	(9	)	(40		)
	Amounts reclassified from accumulated other comprehensive loss	—		—		—		—
	Net current period other comprehensive income	—		(31	)	(9	)	(40		)
	Balances at March 31, 2015	$	5,032	253		63		$	5,348
	Balances at December 31, 2013	$	3,338	376		73		$	3,787
	Other comprehensive income, net of taxes	—		(72	)	(3	)	(75		)
	Amounts reclassified from accumulated other comprehensive loss	—		—		—		—
	Net current period other comprehensive income	—		(72	)	(3	)	(75		)
	Balances at March 31, 2014	$	3,338	304		70		$	3,712
Noncredit Related Losses on Securities Not Expected to Be Sold
Comprehensive loss
Schedule of components of comprehensive loss, net of taxes
		March 31,
	(Dollars in thousands)	2015		2014
	Noncredit losses on other-than-temporarily impaired securities, net of taxes	$	253	$	304

Loans_Receivable_and_Allowance1

Loans Receivable and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2015
Loans Receivable and Allowance for Loan Losses
Schedule of components of loans receivable
		March 31,			December 31,
	(Dollars in thousands)	2015			2014
	Real estate loans:
	First mortgages:
	One- to four-family residential	$	995,241		$	926,074
	Multi-family residential	9,826			8,920
	Construction, commercial, and other	19,092			18,415
	Home equity loans and lines of credit	16,225			15,992
	Total real estate loans	1,040,384			969,401
	Other loans:
	Loans on deposit accounts	245			441
	Consumer and other loans	4,166			4,173
	Total other loans	4,411			4,614
	Less:
	Net unearned fees and discounts	(4,001		)	(4,112		)
	Allowance for loan losses	(1,872		)	(1,691		)
	Total unearned fees, discounts and allowance for loan losses	(5,873		)	(5,803		)
	Loans receivable, net	$	1,038,922		$	968,212
Schedule of activity in allowance for loan losses on loans receivable and by portfolio segment
	(Dollars in thousands)	Residential			Construction,			Home			Consumer			Unallocated			Totals
		Mortgage			Commercial			Equity			and Other
					and Other			Loans and
					Mortgage			Lines of
					Loans			Credit
	Three months ended March 31, 2015:
	Balance, beginning of period	$	413		$	977		$	5		$	263		$	33		$	1,691
	Provision (reversal of allowance) for loan losses	698			(435		)	(2		)	(99		)	32			194
		1,111			542			3			164			65			1,885
	Charge-offs	—			—			—			(19		)	—			(19		)
	Recoveries	—			1			1			4			—			6
	Net charge-offs	—			1			1			(15		)	—			(13		)
	Balance, end of period	$	1,111		$	543		$	4		$	149		$	65		$	1,872
	Three months ended March 31, 2014:
	Balance, beginning of period	$	376		$	799		$	10		$	229		$	72		$	1,486
	Provision (reversal of allowance) for loan losses	58			24			(4		)	(65		)	(4		)	9
		434			823			6			164			68			1,495
	Charge-offs	—			—			—			(17		)	—			(17		)
	Recoveries	—			—			1			6			—			7
	Net charge-offs	—			—			1			(11		)	—			(10		)
	Balance, end of period	$	434		$	823		$	7		$	153		$	68		$	1,485
Schedule of balance in allowance for loan losses and recorded investment in loans by portfolio segment and based on impairment method
	(Dollars in thousands)	Residential			Construction,			Home			Consumer			Unallocated			Totals
		Mortgage			Commercial			Equity			and Other
					and Other			Loans and
					Mortgage			Lines of
					Loans			Credit
	March 31, 2015:
	Allowance for loan losses:
	Ending allowance balance:
	Individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—		$	—
	Collectively evaluated for impairment	1,111			543			4			149			65			1,872
	Total ending allowance balance	$	1,111		$	543		$	4		$	149		$	65		$	1,872
	Loans:
	Ending loan balance:
	Individually evaluated for impairment	$	6,179		$	—		$	132		$	—		$	—		$	6,311
	Collectively evaluated for impairment	994,906			19,063			16,099			4,415			—			1,034,483
	Total ending loan balance	$	1,001,085		$	19,063		$	16,231		$	4,415		$	—		$	1,040,794
	December 31, 2014:
	Allowance for loan losses:
	Ending allowance balance:
	Individually evaluated for impairment	$	—		$	—		$	—		$	—		$	—		$	—
	Collectively evaluated for impairment	413			977			5			263			33			1,691
	Total ending allowance balance	$	413		$	977		$	5		$	263		$	33		$	1,691
	Loans:
	Ending loan balance:
	Individually evaluated for impairment	$	6,158		$	—		$	296		$	4		$	—		$	6,458
	Collectively evaluated for impairment	924,732			18,399			15,702			4,612			—			963,445
	Total ending loan balance	$	930,890		$	18,399		$	15,998		$	4,616		$	—		$	969,903
Schedule of balance of impaired loans individually evaluated for impairment by class of loans
	(Dollars in thousands)	Recorded			Unpaid
		Investment			Principal
					Balance
	March 31, 2015:
	With no related allowance recorded:
	One- to four-family residential mortgages	$	6,179		$	6,845
	Home equity loans and lines of credit	132			162
	Total	$	6,311		$	7,007
	December 31, 2014:
	With no related allowance recorded:
	One- to four-family residential mortgages	$	6,158		$	6,775
	Home equity loans and lines of credit	296			324
	Consumer and other	4			4
	Total	$	6,458		$	7,103
Schedule of average recorded investment and interest income recognized on impaired loans by class of loans
		For the Three Months Ended
		March 31,
	(Dollars in thousands)	Average			Interest
		Recorded			Income
		Investment			Recognized
	2015:00:00
	With no related allowance recorded:
	One- to four-family residential mortgages	$	6,216		$	30
	Home equity loans and lines of credit	134			—
	Total	$	6,350		$	30
	2014:00:00
	With no related allowance recorded:
	One- to four-family residential mortgages	$	7,248		$	32
	Home equity loans and lines of credit	158			—
	Total	$	7,406		$	32
Schedule of aging of loans and accrual status by class of loans
	(Dollars in thousands)	30 — 59			60 — 89			90 Days or			Total Past			Loans Not			Total			Nonaccrual		Loans
		Days Past			Days Past			Greater			Due			Past Due			Loans			Loans		More
		Due			Due			Past Due														Than 90
																						Days Past
																						Due and
																						Still
																						Accruing
	March 31, 2015:
	One- to four-family residential mortgages	$	894		$	580		$	842		$	2,316		$	988,974		$	991,290		$	4,183	$	—
	Multi-family residential mortgages	—			—			—			—			9,795			9,795			—		—
	Construction, commercial and other mortgages	—			—			—			—			19,063			19,063			—		—
	Home equity loans and lines of credit	83			—			—			83			16,148			16,231			132		—
	Loans on deposit accounts	—			—			—			—			245			245			—		—
	Consumer and other	2			—			—			2			4,168			4,170			—		—
	Total	$	979		$	580		$	842		$	2,401		$	1,038,393		$	1,040,794		$	4,315	$	—
	December 31, 2014:
	One- to four-family residential mortgages	$	1,040		$	736		$	593		$	2,369		$	919,624		$	921,993		$	4,153	$	—
	Multi-family residential mortgages	—			—			—			—			8,897			8,897			—		—
	Construction, commercial and other mortgages	—			—			—			—			18,399			18,399			—		—
	Home equity loans and lines of credit	—			—			161			161			15,837			15,998			296		—
	Loans on deposit accounts	—			—			—			—			440			440			—		—
	Consumer and other	7			1			4			12			4,164			4,176			4		—
	Total	$	1,047		$	737		$	758		$	2,542		$	967,361		$	969,903		$	4,453	$	—

Advances_from_the_Federal_Home1

Advances from the Federal Home Loan Bank (Tables)	3 Months Ended
	Mar. 31, 2015
Advances from the Federal Home Loan Bank
Schedule of advances outstanding
		March 31, 2015			December 31, 2014
				Weighted			Weighted
				Average			Average
	(Dollars in thousands)	Amount		Rate	Amount		Rate
	Due within one year	$	—	—%	$	10,000	2.06%
	Due over 3 years to 4 years	27,000		1.57	5,000		1.2
	Total	$	27,000	1.57%	$	15,000	1.77%

Securities_Sold_Under_Agreemen1

Securities Sold Under Agreements to Repurchase (Tables)	3 Months Ended
	Mar. 31, 2015
Securities Sold Under Agreements to Repurchase
Summary of securities sold under agreements to repurchase
		March 31, 2015				December 31, 2014
				Weighted					Weighted
		Repurchase		Average		Repurchase			Average
	(Dollars in thousands)	Liability		Rate		Liability			Rate
	Maturing:
	1 year or less	$	10,000	1.94%		$	47,000		2.11%
	Over 2 years to 3 years	25,000		1.46		25,000			1.46
	Over 3 years to 4 years	20,000		1.66		—			—
	Over 4 years to 5 years	5,000		1.65		—			—
	Total	$	60,000	1.62%		$	72,000		1.88%
Summary comparing carrying value and fair value of securities pledged to secure repurchase agreements, repurchase liability, and amount at risk
												Weighted
		Carrying		Fair								Average
		Value of		Value of			Repurchase			Amount		Months to
	(Dollars in thousands)	Securities		Securities			Liability			at Risk		Maturity
	Maturing:
	Over 90 days	$	76,542	$	78,232		$	60,000		$	18,232	34

Offsetting_of_Financial_Liabil1

Offsetting of Financial Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Offsetting of Financial Liabilities
Schedule of securities sold under agreements to repurchase subject to conditional right of offset
		Gross Amount		Gross Amount		Net Amount of		Gross Amount Not Offset in the
						Liabilities		Balance Sheet
	(Dollars in thousands)	of Recognized		Offset in the		Presented in the		Financial		Cash Collateral		Net Amount
		Liabilities		Balance Sheet		Balance Sheet		Instruments		Pledged
	March 31, 2015:
	Securities sold under agreements to repurchase	$	60,000	$	—	$	60,000	$	60,000	$	—	$	—
	December 31, 2014:
	Securities sold under agreements to repurchase	$	72,000	$	—	$	72,000	$	72,000	$	—	$	—

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2015
Employee Benefit Plans
Schedule of components of net periodic benefit cost
		SERP
		Three Months Ended
		March 31,
	(Dollars in thousands)	2015		2014
	Net periodic benefit cost for the period
	Service cost	$	21	$	25
	Interest cost	31		30
	Expected return on plan assets	—		—
	Amortization of prior service cost	—		—
	Recognized actuarial loss	—		—
	Recognized curtailment loss	—		—
	Net periodic benefit cost	$	52	$	55

Employee_Stock_Ownership_Plan_

Employee Stock Ownership Plan (Tables)	3 Months Ended
	Mar. 31, 2015
Employee Stock Ownership Plan
Schedule of shares held by ESOP trust
		March 31,		December 31,
		2015		2014
	Allocated shares	295,614		283,381
	Unearned shares	672,824		685,057
	Total ESOP shares	968,438		968,438
	Fair value of unearned shares, in thousands	$	15,986	$	14,763

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Share-Based Compensation
Schedule of compensation expense and related tax benefit for all share-based awards
		For the Three Months Ended
		March 31,
	(In thousands)	2015			2014
	Compensation expense	$	660		$	660
	Income tax benefit	265			313
Schedule of stock option activity
		Options		Weighted			Remaining	Aggregate
				Average			Contractual	Intrinsic
				Exercise			Life (Years)	Value
				Price				(in thousands)
	Options outstanding at December 31, 2014	832,954		$	17.38		5.68	$	3,471
	Granted	—		—			—	—
	Exercised	—		—			—	—
	Forfeited	—		—			—	—
	Expired	—		—			—	—
	Options outstanding at March 31, 2015	832,954		$	17.38		5.43	$	5,312
	Options outstanding at December 31, 2013	832,954		$	17.38		6.68	$	4,845
	Granted	—		—			—	—
	Exercised	—		—			—	—
	Forfeited	—		—			—	—
	Expired	—		—			—	—
	Options outstanding at March 31, 2014	832,954		$	17.38		6.43	$	3,512
	Options vested and exercisable at March 31, 2015	555,097		$	17.38		5.43	$	3,541
Schedule of restricted stock award activity
		Restricted		Weighted
		Stock		Average
		Awards		Grant
				Date Fair
				Value
	Nonvested at December 31, 2014	226,733		$	17.39
	Granted	—		—
	Vested	—		—
	Forfeited	—		—
	Nonvested at March 31, 2015	226,733		$	17.39
	Nonvested at December 31, 2013	340,065		$	17.39
	Granted	—		—
	Vested	—		—
	Forfeited	—		—
	Nonvested at March 31, 2014	340,065		$	17.39

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share
Schedule of information used to compute basic and diluted earnings per share
		Three Months Ended
		March 31,
	(Dollars in thousands, except share data)	2015		2014
	Net income	$	3,526	$	3,462
	Weighted-average number of shares used in:
	Basic earnings per share	9,120,720		9,187,540
	Dilutive common stock equivalents:
	Stock options and restricted stock units	199,094		192,620
	Diluted earnings per share	9,319,814		9,380,160
	Net income per common share, basic	$	0.39	$	0.38
	Net income per common share, diluted	$	0.38	$	0.37

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	3 Months Ended
	Mar. 31, 2015
Other Comprehensive Loss
Schedule of changes in components of accumulated other comprehensive loss, net of taxes
	(Dollars in thousands)	Unfunded			Noncredit		Unrealized		Total
		Pension			Related		Loss on
		Liability			Losses on		Securities
					Securities
					Not
					Expected to
					Be Sold
	Balances at December 31, 2014	$	5,032		284		72		$	5,388
	Other comprehensive income, net of taxes	—			(31	)	(9	)	(40		)
	Amounts reclassified from accumulated other comprehensive loss	—			—		—		—
	Net current period other comprehensive income	—			(31	)	(9	)	(40		)
	Balances at March 31, 2015	$	5,032		253		63		$	5,348
	Balances at December 31, 2013	$	3,338		376		73		$	3,787
	Other comprehensive income, net of taxes	—			(72	)	(3	)	(75		)
	Amounts reclassified from accumulated other comprehensive loss	—			—		—		—
	Net current period other comprehensive income	—			(72	)	(3	)	(75		)
	Balances at March 31, 2014	$	3,338		304		70		$	3,712
Schedule of tax effect on each component of other comprehensive loss
		March 31,
		2015									2014
	(Dollars in thousands)	Pretax			Tax			After Tax			Pretax			Tax		After Tax
		Amount						Amount			Amount					Amount
	Unfunded pension liability	$	—		$	—		$	—		$	—		$	—	$	—
	Noncredit related losses on securities not expected to be sold	(51		)	20			(31		)	(118		)	46		(72		)
	Unrealized loss on securities	(15		)	6			(9		)	(5		)	2		(3		)
	Total	$	(66	)	$	26		$	(40	)	$	(123	)	$	48	$	(75	)

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value of Financial Instruments
Schedule of estimated fair values of financial instruments
			Carrying					Fair Value Measurements Using
	(Dollars in thousands)		Amount		Fair Value			Level 1		Level 2			Level 3
	March 31, 2015
	Assets
	Cash and cash equivalents		$	45,774	$	45,774		$	45,774	$	—		$	—
	Investment securities held to maturity		552,461		569,832			—		569,091			741
	FHLB stock		11,112		11,112			—		11,112			—
	FRB stock		2,949		2,949			—		2,949			—
	Loans held for sale		2,910		2,978			—		2,978			—
	Loans receivable, net		1,038,922		1,070,980			—		—			1,070,980
	Accrued interest receivable		4,583		4,583			4,583		—			—
	Interest rate contracts		113		113			—		113			—
	Liabilities
	Deposits		1,381,461		1,382,097			1,158,355		—			223,742
	Advances from the Federal Home Loan Bank		27,000		27,312			—		27,312			—
	Securities sold under agreements to repurchase		60,000		60,607			—		60,607			—
	Accounts payable and accrued expenses (excluding interest rate contracts)		26,756		26,756			26,756		—			—
	Interest rate contracts		101		101			—		101			—
	Investment purchases pending settlement		1,116		1,116			1,116		—			—
	Current income taxes payable		1,051		1,051			1,051		—			—
	Advance payments by borrowers for taxes and insurance		2,710		2,710			2,710		—			—
	December 31, 2014
	Assets
	Cash and cash equivalents		$	75,060	$	75,060		$	75,060	$	—		$	—
	Investment securities held to maturity		572,922		586,710			—		586,020			690
	FHLB stock		11,234		11,234			—		11,234			—
	FRB stock		2,925		2,925			—		2,925			—
	Loans held for sale		1,048		1,079			—		1,079			—
	Loans receivable, net		968,212		998,183			—		—			998,183
	Accrued interest receivable		4,436		4,436			4,436		—			—
	Interest rate contracts		62		62			—		62			—
	Liabilities
	Deposits		1,359,679		1,360,074			1,137,942		—			222,132
	Advances from the Federal Home Loan Bank		15,000		14,977			—		—			14,977
	Securities sold under agreements to repurchase		72,000		72,334			—		—			72,334
	Accounts payable and accrued expenses (excluding interest rate contracts)		24,044		24,044			24,044		—			—
	Interest rate contracts		54		54			—		54			—
	Current income taxes payable		826		826			826		—			—
	Advance payments by borrowers for taxes and insurance		3,916		3,916			3,916		—			—
Schedule of assets and liabilities measured at fair value on a recurring basis
	(Dollars in thousands)		Level 1		Level 2			Level 3		Total
	March 31, 2015
	Interest rate contracts — assets		$	—	$	113		$	—	$	113
	Interest rate contracts — liabilities		—		(101		)	—		(101		)
	December 31, 2014
	Interest rate contracts — assets		$	—	$	62		$	—	$	62
	Interest rate contracts — liabilities		—		(54		)	—		(54		)
Schedule of assets measured at fair value on nonrecurring basis and related gains and losses
	(Dollars in thousands)		Level 1		Level 2			Level 3		Total			Total
													Gains
													(Losses)
	March 31, 2015:
	Trust preferred securities		$	—	$	—		$	741	$	741		$	51
	Mortgage servicing assets		—		—			479		479			(8		)
	December 31, 2014:
	Impaired loans		$	—	$	—		$	327	$	327		$	(4	)
	Trust preferred securities		—		—			690		690			153
	Mortgage servicing assets		—		—			505		505			(15		)
Schedule of significant unobservable inputs for Level 3 nonrecurring fair value measurements
	(Dollars in thousands)		Fair Value		Valuation Technique		Unobservable		Value
							Input
	March 31, 2015:
	Trust preferred securities		$	741	Discounted cash flow		Discount rate		Three-month LIBOR plus 20%
	Mortgage servicing assets		479		Discounted cash flow		Discount rate		10.00%
							Prepayment speed (PSA)		169.8 – 299.3
							Annual cost to service (per loan)		$60
	December 31, 2014:
	Impaired loans — non-collateral dependent		$	327	Discounted cash flow		Discount rate (1)		6.10%
	Trust preferred securities		690		Discounted cash flow		Discount rate		Three-month LIBOR plus 20%
	Mortgage servicing assets		505		Discounted cash flow		Discount rate		10.50%
							Prepayment speed (PSA)		164.8 – 262.5
							Annual cost to service (per loan)		$55
		-1		Represents the yield on contractual cash flows prior to modification in troubled debt restructurings.

Organization_Details

Organization (Details) (Plan of Conversion and Reorganization and Registration of Shares, USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Plan of Conversion and Reorganization and Registration of Shares
Plan of conversion and reorganization
Liquidation account balance	$15.20

Cash_and_Cash_Equivalents_Deta

Cash and Cash Equivalents (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Cash and Cash Equivalents
Cash and due from banks	$10,388	$10,803
Interest-earning deposits in other banks	35,386	64,257
Cash and cash equivalents	$45,774	$75,060	$72,147	$75,365

Investment_Securities_Details

Investment Securities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Held to maturity:
Amortized Cost	$552,461,000	$572,922,000
Gross Unrealized Gains	19,718,000	18,078,000
Gross Unrealized Losses	-2,347,000	-4,290,000
Estimated Fair Value	569,832,000	586,710,000
U.S. government-sponsored mortgage-backed securities
Held to maturity:
Amortized Cost	551,720,000	572,232,000
Gross Unrealized Gains	19,718,000	18,078,000
Gross Unrealized Losses	-2,347,000	-4,290,000
Estimated Fair Value	569,091,000	586,020,000
Trust preferred securities
Held to maturity:
Amortized Cost	741,000	690,000
Estimated Fair Value	$741,000	$690,000

Investment_Securities_Details_

Investment Securities (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Held to maturity, Amortized Cost
Due within 5 years	$46
Due after 5 years through 10 years	9
Due after 10 years	552,406
Total	552,461	572,922
Held to maturity, Estimated Fair Value
Due within 5 years	48
Due after 5 years through 10 years	10
Due after 10 years	569,774
Estimated Fair Value	$569,832	$586,710

Investment_Securities_Details_1

Investment Securities (Details 3) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Sale of held-to-maturity debt securities
Proceeds from the sale of held-to-maturity debt securities	$2,580,000	$3,724,000
Pledged investment securities
Investment securities pledged to secure public deposit, securities sold under agreement to repurchase and transaction clearing accounts	264,000,000		270,200,000
Held-to-maturity debt securities
Realized gains and losses and the proceeds from sales of securities available for sale, held to maturity and trading
Proceeds from sales	2,600,000	3,700,000
Gross gains	236,000	316,000
Sale of held-to-maturity debt securities
Carrying value of held-to-maturity debt securities sold	2,300,000	3,400,000
U.S. government-sponsored mortgage-backed securities
Realized gains and losses and the proceeds from sales of securities available for sale, held to maturity and trading
Proceeds from sales	2,580,000	8,795,000
Gross gains	$236,000	$346,000

Investment_Securities_Details_2

Investment Securities (Details 4) (U.S. government-sponsored mortgage-backed securities, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	item	item
U.S. government-sponsored mortgage-backed securities
Investment Securities
Less Than 12 Months Fair Value	$120,990	$12,717
Less Than 12 Months Unrealized Losses	1,030	65
12 Months or Longer Fair Value	57,955	183,349
12 Months or Longer Unrealized Losses	1,317	4,225
Total Number of Securities	33,000	37,000
Total Fair Value	178,945	196,066
Total Unrealized Losses	$2,347	$4,290

Investment_Securities_Details_3

Investment Securities (Details 5) (USD $)	3 Months Ended		27 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2014
			Transaction
			security
Investment Securities
Purchase of mortgage-backed security	$1,204,000	$27,926,000
Amortized cost	552,461,000		552,461,000	572,922,000
U.S. government-sponsored mortgage-backed securities
Investment Securities
Purchase of mortgage-backed security	1,200,000
Amortized cost	551,720,000		551,720,000	572,232,000
Trust preferred securities
Investment Securities
Number of securities owned	2		2
Number of market transactions of the security			5
Amortized cost	741,000		741,000	690,000
Remaining amortized cost basis	1,100,000		1,100,000
Trust preferred securities | PreTSL XXIV
Investment Securities
Amortized cost	0		0
Trust preferred securities | PreTSL XXIII
Investment Securities
Amortized cost	$741,000		$741,000

Investment_Securities_Details_4

Investment Securities (Details 6) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Cumulative roll forward of credit losses recognized in earnings for debt securities held and not intended to be sold
Beginning balance	$5,885	$5,885	$5,885	$5,885
Ending balance	5,885	5,885	5,885	5,885
Components of comprehensive loss, net of taxes, resulting from other-than-temporarily impaired securities
Noncredit losses on other-than-temporarily impaired securities, net of taxes	$253		$304

Loans_Receivable_and_Allowance2

Loans Receivable and Allowance for Loan Losses (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Real estate loans:
Total real estate loans	$1,040,384	$969,401
Other loans:
Total other loans	4,411	4,614
Less: Net unearned fees and discounts	-4,001	-4,112
Less: Allowance for loan losses	-1,872	-1,691	-1,485	-1,486
Total unearned fees, discounts and allowance for loan losses	-5,873	-5,803
Loans receivable, net	1,038,922	968,212
One- to four-family residential
Real estate loans:
Total real estate loans	995,241	926,074
Multi-family residential
Real estate loans:
Total real estate loans	9,826	8,920
Construction, Commercial and Other Mortgage Loans
Real estate loans:
Total real estate loans	19,092	18,415
Other loans:
Less: Allowance for loan losses	-543	-977	-823	-799
Home Equity Loans and Lines of Credit
Real estate loans:
Total real estate loans	16,225	15,992
Other loans:
Less: Allowance for loan losses	-4	-5	-7	-10
Loans on deposit accounts
Other loans:
Total other loans	245	441
Consumer and other loans
Other loans:
Total other loans	$4,166	$4,173

Loans_Receivable_and_Allowance3

Loans Receivable and Allowance for Loan Losses (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Activity in allowance for loan losses
Balance, beginning of year	$1,691	$1,486
Provision (reversal of allowance) for loan losses	194	9
Allowance for loan losses on loans receivable after provision (reversal of allowance)	1,885	1,495
Charge-offs	-19	-17
Recoveries	6	7
Net charge-offs	-13	-10
Balance, end of year	1,872	1,485
Residential Mortgage
Activity in allowance for loan losses
Balance, beginning of year	413	376
Provision (reversal of allowance) for loan losses	698	58
Allowance for loan losses on loans receivable after provision (reversal of allowance)	1,111	434
Balance, end of year	1,111	434
Construction, Commercial and Other Mortgage Loans
Activity in allowance for loan losses
Balance, beginning of year	977	799
Provision (reversal of allowance) for loan losses	-435	24
Allowance for loan losses on loans receivable after provision (reversal of allowance)	542	823
Recoveries	1
Net charge-offs	1
Balance, end of year	543	823
Home Equity Loans and Lines of Credit
Activity in allowance for loan losses
Balance, beginning of year	5	10
Provision (reversal of allowance) for loan losses	-2	-4
Allowance for loan losses on loans receivable after provision (reversal of allowance)	3	6
Recoveries	1	1
Net charge-offs	1	1
Balance, end of year	4	7
Consumer and Other
Activity in allowance for loan losses
Balance, beginning of year	263	229
Provision (reversal of allowance) for loan losses	-99	-65
Allowance for loan losses on loans receivable after provision (reversal of allowance)	164	164
Charge-offs	-19	-17
Recoveries	4	6
Net charge-offs	-15	-11
Balance, end of year	149	153
Unallocated
Activity in allowance for loan losses
Balance, beginning of year	33	72
Provision (reversal of allowance) for loan losses	32	-4
Allowance for loan losses on loans receivable after provision (reversal of allowance)	65	68
Balance, end of year	$65	$68

Loans_Receivable_and_Allowance4

Loans Receivable and Allowance for Loan Losses (Details 3) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Allowance for loan losses:
Collectively evaluated for impairment	$1,872	$1,691
Total ending allowance balance	1,872	1,691	1,485	1,486
Loans:
Individually evaluated for impairment	6,311	6,458
Collectively evaluated for impairment	1,034,483	963,445
Total ending loan balance	1,040,794	969,903
Residential Mortgage
Allowance for loan losses:
Collectively evaluated for impairment	1,111	413
Total ending allowance balance	1,111	413	434	376
Loans:
Individually evaluated for impairment	6,179	6,158
Collectively evaluated for impairment	994,906	924,732
Total ending loan balance	1,001,085	930,890
Construction, Commercial and Other Mortgage Loans
Allowance for loan losses:
Collectively evaluated for impairment	543	977
Total ending allowance balance	543	977	823	799
Loans:
Collectively evaluated for impairment	19,063	18,399
Total ending loan balance	19,063	18,399
Home Equity Loans and Lines of Credit
Allowance for loan losses:
Collectively evaluated for impairment	4	5
Total ending allowance balance	4	5	7	10
Loans:
Individually evaluated for impairment	132	296
Collectively evaluated for impairment	16,099	15,702
Total ending loan balance	16,231	15,998
Consumer and Other
Allowance for loan losses:
Collectively evaluated for impairment	149	263
Total ending allowance balance	149	263	153	229
Loans:
Individually evaluated for impairment		4
Collectively evaluated for impairment	4,415	4,612
Total ending loan balance	4,415	4,616
Unallocated
Allowance for loan losses:
Collectively evaluated for impairment	65	33
Total ending allowance balance	$65	$33	$68	$72

Loans_Receivable_and_Allowance5

Loans Receivable and Allowance for Loan Losses (Details 4) (Individually Evaluated for Impairment, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Impaired loans
Recorded Investment	$6,311		$6,458
Unpaid Principal Balance	7,007		7,103
Average Recorded Investment	6,350	7,406
Interest Income Recognized	30	32
Loans individually evaluated for impairment with a related allowance for loan loss	0		0
One- to four-family residential
Impaired loans
Recorded Investment	6,179		6,158
Unpaid Principal Balance	6,845		6,775
Average Recorded Investment	6,216	7,248
Interest Income Recognized	30	32
Home Equity Loans and Lines of Credit
Impaired loans
Recorded Investment	132		296
Unpaid Principal Balance	162		324
Average Recorded Investment	134	158
Consumer and Other
Impaired loans
Recorded Investment			4
Unpaid Principal Balance			$4

Loans_Receivable_and_Allowance6

Loans Receivable and Allowance for Loan Losses (Details 5) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due
30 - 59 Days Past Due	$979	$1,047
60 - 89 Days Past Due	580	737
90 Days or Greater Past Due	842	758
Total Past Due	2,401	2,542
Loans Not Past Due	1,038,393	967,361
Total ending loan balance	1,040,794	969,903
Nonaccrual Loans	4,315	4,453
One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
30 - 59 Days Past Due	894	1,040
60 - 89 Days Past Due	580	736
90 Days or Greater Past Due	842	593
Total Past Due	2,316	2,369
Loans Not Past Due	988,974	919,624
Total ending loan balance	991,290	921,993
Nonaccrual Loans	4,183	4,153
Multi-family residential
Financing Receivable, Recorded Investment, Past Due
Loans Not Past Due	9,795	8,897
Total ending loan balance	9,795	8,897
Construction, Commercial and Other Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Loans Not Past Due	19,063	18,399
Total ending loan balance	19,063	18,399
Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment, Past Due
30 - 59 Days Past Due	83
90 Days or Greater Past Due		161
Total Past Due	83	161
Loans Not Past Due	16,148	15,837
Total ending loan balance	16,231	15,998
Nonaccrual Loans	132	296
Loans on deposit accounts
Financing Receivable, Recorded Investment, Past Due
Loans Not Past Due	245	440
Total ending loan balance	245	440
Consumer and other loans
Financing Receivable, Recorded Investment, Past Due
30 - 59 Days Past Due	2	7
60 - 89 Days Past Due		1
90 Days or Greater Past Due		4
Total Past Due	2	12
Loans Not Past Due	4,168	4,164
Total ending loan balance	4,170	4,176
Nonaccrual Loans		$4

Loans_Receivable_and_Allowance7

Loans Receivable and Allowance for Loan Losses (Details 6) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	loan		loan
Accounts, Notes, Loans and Financing Receivable
Nonaccrual Loans	$4,315,000		$4,453,000
Mortgage Loans on Real Estate | Minimum
Accounts, Notes, Loans and Financing Receivable
Loan delinquency period that may result in loss	90 days
Loan delinquency period after which an appraisal is obtained of the underlying collateral	5 months
Non Accrual Loans
Accounts, Notes, Loans and Financing Receivable
Number of loans	17		18
Nonaccrual Loans	4,300,000		4,500,000
Interest collected on nonaccrual loans recorded as a reduction of principal	50,000	52,000
Non accrual loans, additional interest income that would have been recognized had the loans been accruing interest	$66,000	$70,000

Loans_Receivable_and_Allowance8

Loans Receivable and Allowance for Loan Losses (Details 7) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2014
	loan		loan	loan
Troubled debt restructurings
Real estate owned	$0	$0	$0
Number of loans subsequently defaulted	3		0
Total value of loans subsequently defaulted	691,000	1,000,000
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired	17		17	17
Loans modified by troubled debt restructurings considered impaired	4,500,000		4,500,000	4,600,000
Loans modified in troubled debt restructuring
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired	0	0	0
Commitments to lend additional funds to borrowers	0		0
Performing Financing Receivable
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired				6
Loans modified by troubled debt restructurings considered impaired				2,000,000
Performing Financing Receivable | Accruing interest
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired	6		6
Loans modified by troubled debt restructurings considered impaired	2,000,000		2,000,000
Performing Financing Receivable | Non Accrual Loans
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired	9		9	9
Loans modified by troubled debt restructurings considered impaired	2,200,000		2,200,000	2,200,000
Nonperforming Financing Receivable | Non Accrual Loans
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired	2		2	2
Loans modified by troubled debt restructurings considered impaired				343,000
Loan modified by troubled debt restructurings greater than 149 days delinquent	342,000		342,000
One- to four-family residential
Troubled debt restructurings
Number of loans subsequently defaulted		3
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired	16		16	16
Loans modified by troubled debt restructurings considered impaired	4,400,000		4,400,000	4,400,000
Home Equity Loans and Lines of Credit
Additional disclosures
Number of loans modified by troubled debt restructurings considered impaired	1		1	1
Loans modified by troubled debt restructurings considered impaired	$132,000		$132,000	$135,000

Loans_Receivable_and_Allowance9

Loans Receivable and Allowance for Loan Losses (Details 8) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
	loan		loan
Accounts, Notes, Loans and Financing Receivable
Loans serviced for others	$59,000,000		$60,500,000
Loans serviced for others, securitization for which the company continues to hold the related mortgage-backed securities	2,900,000		3,000,000
Loans serviced for others, amount of contractually specified servicing fees earned	41,000	47,000
Mortgage Loans on Real Estate | Maximum
Accounts, Notes, Loans and Financing Receivable
Loan to value ratio (as a percent)	80.00%
Residential Mortgage Loans Held For Sale
Accounts, Notes, Loans and Financing Receivable
Residential mortgage loans sold, loan amount	13,300,000	9,900,000
Residential mortgage loans sold, recognized gains	129,000	79,000
Number of loans	9		6
Residential mortgage loans held for sale	$2,900,000		$1,000,000

Advances_from_the_Federal_Home2

Advances from the Federal Home Loan Bank (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Advances from the Federal Home Loan Bank
Available additional unused FHLB advances	$396,000,000		$389,200,000
Advances outstanding
Due within one year		10,000,000
Due over 3 years to 4 years	27,000,000	5,000,000
Total	$27,000,000	$15,000,000
Weighted Average Rate
Due within one year (as a percent)		2.06%
Due over 3 years to 4 years (as a percent)	1.57%	1.20%
Total (as a percent)	1.57%	1.77%

Securities_Sold_Under_Agreemen2

Securities Sold Under Agreements to Repurchase (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Securities sold under agreements to repurchase
Repurchase Liability	$60,000	$72,000
Repurchase liability maximum	90.00%	90.00%
Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.62%	1.88%
1 year or less
Securities sold under agreements to repurchase
Repurchase Liability	10,000	47,000
1 year or less | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.94%	2.11%
Over 2 years to 3 years
Securities sold under agreements to repurchase
Repurchase Liability	25,000	25,000
Over 2 years to 3 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.46%	1.46%
Over 3 years to 4 years
Securities sold under agreements to repurchase
Repurchase Liability	20,000
Over 3 years to 4 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.66%
Over 4 years to 5 years
Securities sold under agreements to repurchase
Repurchase Liability	$5,000
Over 4 years to 5 years | Weighted Average
Securities sold under agreements to repurchase
Rate (as a percent)	1.65%

Securities_Sold_Under_Agreemen3

Securities Sold Under Agreements to Repurchase (Details 2) (Maturing Over 90 days, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015
Maturing Over 90 days
Securities sold under agreements to repurchase
Carrying Value of Securities	$76,542
Fair Value of Securities	78,232
Repurchase Liability	60,000
Amount at Risk	$18,232
Weighted Average Months to Maturity	34 months

Offsetting_of_Financial_Liabil2

Offsetting of Financial Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Securities sold under agreements to repurchase
Gross Amount of Recognized Liabilities	$60,000	$72,000
Net Amount of Liabilities Presented in the Balance Sheet	60,000	72,000
Gross amount not offset in the balance sheet
Financial Instruments	$60,000	$72,000

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Pension Plan | Minimum
Employee benefit plans
Defined Benefit Plan Requisite Service Period	1 year
Supplemental Employee Retirement Plan (SERP)
Net periodic benefit cost for the year:
Service cost	$21	$25
Interest cost	31	30
Net periodic benefit cost	$52	$55

Employee_Stock_Ownership_Plan_1

Employee Stock Ownership Plan (Details) (USD $)	0 Months Ended	3 Months Ended
	Jul. 10, 2009	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Employee Stock Ownership Plan
ESOP expense		$268,000	$273,000
ESOP
Employee Stock Ownership Plan
Amount borrowed from employer	9,800,000
Shares purchased	978,650
Percentage of shares issued in initial public offering	8.00%
Employee stock ownership plan, price per share of shares acquired in initial public offering (in dollars per share)	$10
Term of loan		20 years
ESOP expense		222,000	240,000
Allocated shares		295,614		283,381
Unearned shares		672,824		685,057
Total ESOP shares		968,438		968,438
Fair value of unearned shares, in thousands		$15,986,000		$14,763,000
ESOP | Prime rate
Employee Stock Ownership Plan
Variable interest rate		Wall Street Journal Prime Rate

Employee_Stock_Ownership_Plan_2

Employee Stock Ownership Plan (Details 2) (ESOP restoration, Certain executives, USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
ESOP restoration | Certain executives
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Accrued benefits	$64,000	$74,000

ShareBased_Compensation_Detail

Share-Based Compensation (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-Based Compensation
Compensation expense	$660	$660
Income tax benefit	$265	$313
Number of shares authorized	1,712,637
2010 Equity Incentive Plan | Minimum
Share-Based Compensation
Period for recognition of award cost	5 years
Vesting period	5 years
2010 Equity Incentive Plan | Maximum
Share-Based Compensation
Period for recognition of award cost	6 years
Vesting period	6 years

ShareBased_Compensation_Detail1

Share-Based Compensation (Details 2) (Stock Options, USD $)	3 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Stock Options
Stock option activity
Balance at beginning of year (in shares)	832,954	832,954	832,954
Balance at end of year (in shares)	832,954	832,954	832,954	832,954
Options vested and exercisable (in shares)	555,097
Weighted Average Exercise Price
Balance at beginning of year (in dollars per share)	$17.38	$17.38	$17.38
Balance at end of year (in dollars per share)	$17.38	$17.38	$17.38	$17.38
Options vested and exercisable (in dollars per share)	$17.38
Remaining Contractual Life
Beginning of year	5 years 5 months 5 days	6 years 5 months 5 days	5 years 8 months 5 days	6 years 8 months 5 days
End of year	5 years 5 months 5 days	6 years 5 months 5 days	5 years 8 months 5 days	6 years 8 months 5 days
Options vested and exercisable	5 years 5 months 5 days
Aggregate Intrinsic Value
Beginning of year	$3,471	$4,845	$4,845
End of year	5,312	3,512	3,471	4,845
Options vested and exercisable	$3,541

ShareBased_Compensation_Detail2

Share-Based Compensation (Details 3) (Stock Options, USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-Based Compensation
Unrecognized compensation costs	$1
Vested (in shares)	0	0
Minimum
Share-Based Compensation
Unrecognized compensation costs, period of recognition	5 years
Vesting period	5 years
Maximum
Share-Based Compensation
Unrecognized compensation costs, period of recognition	6 years
Vesting period	6 years

ShareBased_Compensation_Detail3

Share-Based Compensation (Details 4) (Restricted Stock, USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Restricted Stock Awards
Non-vested at beginning of year (in shares)		226,733	340,065	340,065
Non-vested at end of year (in shares)	226,733	226,733	340,065	340,065
Weighted Average Grant Date Fair Value
Non-vested at beginning of year (in dollars per share)		$17.39	$17.39	$17.39
Non-vested at end of year (in dollars per share)	17.39	$17.39	$17.39	$17.39
Unrecognized compensation
Unrecognized compensation costs	2.8
Minimum
Unrecognized compensation
Unrecognized compensation costs, period of recognition	5 years
Vesting period	5 years
Maximum
Unrecognized compensation
Unrecognized compensation costs, period of recognition	6 years
Vesting period	6 years

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
	item
Earnings Per Share
Net income	$3,526	$3,462
Weighted-average number of shares used in:
Basic earnings per share (in shares)	9,120,720	9,187,540
Dilutive common stock equivalents:
Stock options and restricted stock units (in shares)	199,094	192,620
Diluted earnings per share (in shares)	9,319,814	9,380,160
Net income per common share, basic (in dollars per share)	$0.39	$0.38
Net income per common share, diluted (in dollars per share)	$0.38	$0.37
Number of different forms of outstanding common stock	2

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Changes in the components of accumulated other comprehensive loss, net of taxes
Balance at beginning of period	$5,388	$3,787
Other comprehensive income, net of taxes	-40	-75
Net current period other comprehensive income	-40	-75
Balance at end of period	5,348	3,712
Unfunded Pension Liability
Changes in the components of accumulated other comprehensive loss, net of taxes
Balance at beginning of period			5,032	3,338
Balance at end of period	5,032	3,338	5,032	3,338
Noncredit Related Losses on Securities Not Expected to Be Sold
Changes in the components of accumulated other comprehensive loss, net of taxes
Balance at beginning of period	284	376
Other comprehensive income, net of taxes	-31	-72
Net current period other comprehensive income	-31	-72
Balance at end of period	253	304
Unrealized Loss on Securities
Changes in the components of accumulated other comprehensive loss, net of taxes
Balance at beginning of period	72	73
Other comprehensive income, net of taxes	-9	-3
Net current period other comprehensive income	-9	-3
Balance at end of period	$63	$70

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accumulated other comprehensive loss
Pretax amount	($66)	($123)
Tax	26	48
Net current period other comprehensive income	-40	-75
Noncredit Related Losses on Securities Not Expected to Be Sold
Accumulated other comprehensive loss
Pretax amount	-51	-118
Tax	20	46
Net current period other comprehensive income	-31	-72
Unrealized Loss on Securities
Accumulated other comprehensive loss
Pretax amount	-15	-5
Tax	6	2
Net current period other comprehensive income	($9)	($3)

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	99 Months Ended	27 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
		Transaction
Investment Securities
Securities issued	0
Trust preferred securities
Investment Securities
Number of transactions of the securities owned by the company		5
Fair Value, Measurements, Nonrecurring | Level 3 | Discounted cash flow model | Trust preferred securities
Investment Securities
Discount rate, margin added to variable rate (as a percent)			20.00%	20.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Discounted cash flow model | Trust preferred securities | LIBOR
Investment Securities
Discount rate variable rate basis			Three-month LIBOR	Three-month LIBOR
Discount rate, margin added to variable rate (as a percent)			20.00%	20.00%
Fair Value, Measurements, Nonrecurring | Level 3 | Discounted cash flow model | PreTSL XXIII
Investment Securities
Fair value estimate per $100 par value (in dollars per security par value)	20.93	20.93	20.93	20.93
Investment securities fair value assumptions, par value	100	100	100	100

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Assets
Investment securities held to maturity	$569,832	$586,710
Accrued interest receivable	4,583	4,436
Liabilities
Investment purchases pending settlement	1,166
Current income taxes payable	1,051	826
Advance payments by borrowers for taxes and insurance	2,710	3,916
Carrying Amount
Assets
Cash and cash equivalents	45,774	75,060
Investment securities held to maturity	552,461	572,922
FHLB stock	11,112	11,234
FRB stock	2,949	2,925
Loans held for sale	2,910	1,048
Loans receivable, net	1,038,922	968,212
Accrued interest receivable	4,583	4,436
Interest rate contracts	113	62
Liabilities
Deposits	1,381,461	1,359,679
Advances from the Federal Home Loan Bank	27,000	15,000
Securities sold under agreements to repurchase	60,000	72,000
Accounts payable and accrued expenses (excluding interest rate contracts)	26,756	24,044
Interest rate contracts	101	54
Investment purchases pending settlement	1,116
Current income taxes payable	1,051	826
Advance payments by borrowers for taxes and insurance	2,710	3,916
Estimated Fair Value
Assets
Cash and cash equivalents	45,774	75,060
Investment securities held to maturity	569,832	586,710
FHLB stock	11,112	11,234
FRB stock	2,949	2,925
Loans held for sale	2,978	1,079
Loans receivable, net	1,070,980	998,183
Accrued interest receivable	4,583	4,436
Interest rate contracts	113	62
Liabilities
Deposits	1,382,097	1,360,074
Advances from the Federal Home Loan Bank	27,312	14,977
Securities sold under agreements to repurchase	60,607	72,334
Accounts payable and accrued expenses (excluding interest rate contracts)	26,756	24,044
Interest rate contracts	101	54
Investment purchases pending settlement	1,116
Current income taxes payable	1,051	826
Advance payments by borrowers for taxes and insurance	2,710	3,916
Estimated Fair Value | Level 1
Assets
Cash and cash equivalents	45,774	75,060
Accrued interest receivable	4,583	4,436
Liabilities
Deposits	1,158,355	1,137,942
Accounts payable and accrued expenses (excluding interest rate contracts)	26,756	24,044
Investment purchases pending settlement	1,116
Current income taxes payable	1,051	826
Advance payments by borrowers for taxes and insurance	2,710	3,916
Estimated Fair Value | Level 2
Assets
Investment securities held to maturity	569,091	586,020
FHLB stock	11,112	11,234
FRB stock	2,949	2,925
Loans held for sale	2,978	1,079
Interest rate contracts	113	62
Liabilities
Interest rate contracts	101	54
Estimated Fair Value | Level 3
Assets
Investment securities held to maturity	741	690
Loans receivable, net	1,070,980	998,183
Liabilities
Deposits	223,742	222,132
Advances from the Federal Home Loan Bank	27,312	14,977
Securities sold under agreements to repurchase	$60,607	$72,334

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments (Details 3) (Fair Value, Measurements, Recurring, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Level 2
Assets and Liabilities Measured at Fair Value on Recurring Basis
Interest rate contracts - assets	$113	$62
Interest rate contracts - liabilities	-101	-54
Estimated Fair Value
Assets and Liabilities Measured at Fair Value on Recurring Basis
Interest rate contracts - assets	113	62
Interest rate contracts - liabilities	($101)	($54)

Fair_Value_of_Financial_Instru5

Fair Value of Financial Instruments (Details 4) (Fair Value, Measurements, Nonrecurring, USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Impaired loans
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Total Gains (Losses)		($4)
Trust preferred securities
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Total Gains (Losses)	51	153
Mortgage servicing assets
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Total Gains (Losses)	-8	-15
Level 3 | Impaired loans
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value		327
Level 3 | Trust preferred securities
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	741	690
Level 3 | Mortgage servicing assets
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	479	505
Estimated Fair Value | Impaired loans
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value		327
Estimated Fair Value | Trust preferred securities
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	741	690
Estimated Fair Value | Mortgage servicing assets
Assets Measured at Fair Value on Nonrecurring Basis and Related Losses
Fair value	$479	$505

Fair_Value_of_Financial_Instru6

Fair Value of Financial Instruments (Details 5) (Fair Value, Measurements, Nonrecurring, Level 3, USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Impaired loans
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Fair Value		327
Trust preferred securities
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Fair Value	741	690
Mortgage servicing assets
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Fair Value	479	505
Discounted cash flow model | Impaired loans
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Discount rate (as a percent)		6.10%	[1]
Discounted cash flow model | Impaired loans | Minimum
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Discount rate (as a percent)		6.10%
Discounted cash flow model | Trust preferred securities
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Discount rate, margin added to variable rate (as a percent)	20.00%	20.00%
Discounted cash flow model | Trust preferred securities | LIBOR
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Discount rate variable rate basis	Three-month LIBOR	Three-month LIBOR
Discount rate, margin added to variable rate (as a percent)	20.00%	20.00%
Discounted cash flow model | Mortgage servicing assets
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Discount rate (as a percent)	10.00%	10.50%
Annual cost to service (in dollars per loan)	60	55
Discounted cash flow model | Mortgage servicing assets | Minimum
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Prepayment speed (PSA) (as percent)	169.80%	164.80%
Discounted cash flow model | Mortgage servicing assets | Maximum
Significant Unobservable Inputs for Level Three Nonrecurring Fair Value Measurements
Prepayment speed (PSA) (as percent)	299.30%	262.50%
[1]	Represents the yield on contractual cash flows prior to modification in troubled debt restructurings.

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 30, 2015
Subsequent Events
Quarterly cash dividend declared on common stock (in dollars per share)	$0.16	$0.14
Subsequent event
Subsequent Events
Quarterly cash dividend declared on common stock (in dollars per share)			$0.16