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v3.6.0.2

Subsequent Events (Detail) - USD ($) |  |  |  |  | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 24, 2017 | Feb. 15, 2017 | Feb. 06, 2017 | Feb. 01, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Feb. 01, 2020 | Feb. 07, 2017 | Dec. 16, 2016
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock dividends declared (in $ per share) |  |  |  |  | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 1.8 | $ 1.8 | $ 1.35 |  |  |
Term loan [Member] | Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 475,000,000.0
Revolving credit facility [Member] | Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000.0
Revolving credit facility [Member] | Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 150,000,000.0 |  |  |  |  |  |  |  |
Subsequent event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from stock issuance |  |  |  | $ 207,100,000 |  |  |  |  |  |  |  |  |  |
Common stock dividends declared (in $ per share) |  | $ 0.45 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event [Member] | Common stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) |  |  |  | 910,000 |  |  |  |  |  |  |  |  |  |
Net proceeds from stock issuance |  |  |  | $ 207,100,000 |  |  |  |  |  |  |  |  |  |
Subsequent event [Member] | Convertible preferred stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) |  |  |  | 1,150,000 |  |  |  |  |  |  |  |  |  |
Preferred stock dividend rate |  |  |  | 7.25% |  |  |  |  |  |  |  |  |  |
Preferred stock liquidation preference (in $ per share) | $ 100 |  |  | $ 100.00 |  |  |  |  |  |  |  |  |  |
Preferred stock conversion, threshold consecutive trading days |  |  |  | 20 days |  |  |  |  |  |  |  |  |  |
Preferred stock dividends declared (in $ per share) |  | $ 1.8125 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event [Member] | Underwriters option [Member] | Common stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | 136,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from stock issuance | $ 14,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event [Member] | Forecast [Member] | Underwriters option [Member] | Common stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued (in shares) | 136,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event [Member] | Minimum [Member] | Forecast [Member] | Convertible preferred stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issuable upon conversion (in shares) |  |  |  |  |  |  |  |  |  |  |  | 0.7576 |  |
Subsequent event [Member] | Maximum [Member] | Forecast [Member] | Convertible preferred stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issuable upon conversion (in shares) |  |  |  |  |  |  |  |  |  |  |  | 0.9091 |  |
Subsequent event [Member] | Term loan [Member] | Loan Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  | $ 260,000,000.0 |
Subsequent event [Member] | Revolving credit facility [Member] | Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of debt |  |  | $ 30,000,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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