XML 62 R49.htm IDEA: XBRL DOCUMENT v3.20.2

Debt (Schedule of Debt) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Sep. 25, 2018	Sep. 24, 2018
Debt Instrument [Line Items]
Total notes payable principal	$ 667,547,000	$ 645,896,000
Less deferred financing costs, net of accumulated amortization	(1,031,000)	(1,197,000)
Total notes payable	666,516,000	644,699,000
Fixed rate notes | $10.5 million, 4.85% Note, due September 24, 2020
Debt Instrument [Line Items]
Total notes payable principal	0	9,260,000
Face amount of debt	$ 10,500,000
Stated interest rate	4.85%
Fixed rate notes | $100.0 million, 1.73% plus 1.35% to 1.90% Note, due October 2022
Debt Instrument [Line Items]
Total notes payable principal	$ 100,000,000	100,000,000
Face amount of debt	$ 100,000,000.0
Imputed interest rate	1.73%
Fixed rate notes | $100.0 million, 1.73% plus 1.35% to 1.90% Note, due October 2022 | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.35%
Fixed rate notes | $100.0 million, 1.73% plus 1.35% to 1.90% Note, due October 2022 | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.90%
Fixed rate notes | $165.0 million, 2.24% plus 1.35% to 1.90% Note, due January 31, 2024
Debt Instrument [Line Items]
Total notes payable principal	$ 165,000,000	165,000,000
Face amount of debt	$ 165,000,000.0
Imputed interest rate	2.24%
Fixed rate notes | $165.0 million, 2.24% plus 1.35% to 1.90% Note, due January 31, 2024 | Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.35%
Fixed rate notes | $165.0 million, 2.24% plus 1.35% to 1.90% Note, due January 31, 2024 | Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.90%
Fixed rate notes | $80.0 million, 3.72% Note, due June 1, 2027
Debt Instrument [Line Items]
Total notes payable principal	$ 80,000,000	80,000,000
Face amount of debt	$ 80,000,000.0
Stated interest rate	3.72%
Fixed rate notes | $19.0 million 4.15% Note, due December 1, 2024
Debt Instrument [Line Items]
Total notes payable principal	$ 18,768,000	19,000,000
Face amount of debt	$ 19,000,000.0
Stated interest rate	4.15%
Fixed rate notes | $20.2 million 4.28% Note, due June 6, 2023
Debt Instrument [Line Items]
Total notes payable principal	$ 18,323,000	18,616,000
Face amount of debt	$ 20,200,000
Stated interest rate	4.28%
Fixed rate notes | $14.0 million 4.34% Note, due September 11, 2024
Debt Instrument [Line Items]
Total notes payable principal	$ 13,300,000	13,482,000
Face amount of debt	$ 14,000,000.0
Stated interest rate	4.34%
Fixed rate notes | $14.3 million 4.34% Note, due September 11, 2024
Debt Instrument [Line Items]
Total notes payable principal	$ 14,073,000	14,243,000
Face amount of debt	$ 14,300,000
Stated interest rate	4.34%
Fixed rate notes | $15.1 million 4.99% Note, due January 6, 2024
Debt Instrument [Line Items]
Total notes payable principal	$ 14,228,000	14,409,000
Face amount of debt	$ 15,100,000
Stated interest rate	4.99%
Fixed rate notes | $2.6 million 5.46% Note, due October 1, 2023
Debt Instrument [Line Items]
Total notes payable principal	$ 2,351,000	2,386,000
Face amount of debt	$ 2,600,000
Stated interest rate	5.46%
Fixed rate notes | $50.0 million, 5.09% Note, due March 22, 2029
Debt Instrument [Line Items]
Total notes payable principal	$ 50,000,000	50,000,000
Face amount of debt	$ 50,000,000.0
Stated interest rate	5.09%
Fixed rate notes | $50.0 million, 5.17% Note, due March 22, 2029
Debt Instrument [Line Items]
Total notes payable principal	$ 50,000,000	50,000,000
Face amount of debt	$ 50,000,000.0
Stated interest rate	5.17%
Fixed rate notes | $1.7 million 1.00% Note, due May 6, 2022
Debt Instrument [Line Items]
Total notes payable principal	$ 1,734,000	0
Face amount of debt	$ 1,700,000
Stated interest rate	1.00%
Fixed rate notes | $1.1 million 4.53% Note, due November 28, 2020
Debt Instrument [Line Items]
Total notes payable principal	$ 270,000	0
Face amount of debt	$ 1,100,000
Stated interest rate	4.53%
Floating rate notes | Unsecured line of credit, LIBOR plus 1.40% to 1.90%, due January 31, 2023 | LIBOR Rate
Debt Instrument [Line Items]
Total notes payable principal	$ 139,500,000	$ 109,500,000
Floating rate notes | Unsecured line of credit, LIBOR plus 1.40% to 1.90%, due January 31, 2023 | Minimum [Member] | LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.40%
Floating rate notes | Unsecured line of credit, LIBOR plus 1.40% to 1.90%, due January 31, 2023 | Maximum [Member] | LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.90%
Interest rate swap | $10.5 million, 4.85% Note, due September 24, 2020
Debt Instrument [Line Items]
Stated interest rate			4.85%	3.55%
Interest rate swap | $100.0 million, 1.73% plus 1.35% to 1.90% Note, due October 2022
Debt Instrument [Line Items]
Stated interest rate	1.73%
Interest rate swap | $165.0 million, 2.24% plus 1.35% to 1.90% Note, due January 31, 2024
Debt Instrument [Line Items]
Stated interest rate	2.24%

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Debt Instrument, Imputed Interest Rate

+ References

No definition available.

+ Details

Name:	wsr_DebtInstrumentImputedInterestRate
Namespace Prefix:	wsr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=wsr_FixedRateNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FourPointEightFivePercentNoteDue2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_OnePointSevenThreePercentPlusOnePointThreeFivePercenttoOnePointNineZeroPercentNoteDue2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_TwoPointTwoFourPercentPlusOnePointThreeFivePercenttoOnePointNineZeroPercentNoteDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_ThreePointSevenTwoPercentNoteDueJune12027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FourPointOneFivePercentNoteDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FourPointTwoEightPercentNoteDue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FourPointThreeFourPercentNoteDueSeptember20241Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FourPointThreeFourPercentNoteDueSeptember20242Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FourPointNineNinePercentNoteDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FivePointFourSixPercentNoteDue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FivePointZeroNinePercentNotesDue2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FivePointOneSevenPercentNotesDue2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_OnePointZeroZeroPercentNoteDue2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_FourPointFiveThreePercentNotesDue2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=wsr_FloatingRateNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=wsr_LIBORPlusOnePointFourZeroPercenttoOnePointNineFivePercentUnsecuredLineofCreditDue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: