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v3.19.1

Notes Payable (Details) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2017 | Mar. 31, 2017 | Jan. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 05, 2013
Debt Instruments [Abstract] |  |  |  |  |  |  |
Aggregate principal payment due in 2019 |  |  |  | $ 1,434,000 |  |  |
Aggregate principal payment due in 2020 |  |  |  | 402,000 |  |  |
Gain on derecognition of debt |  |  |  | 1,846,000 | $ 0 | $ 0 |
Derecognition of debt, net after tax |  |  |  | $ 1,400,000 |  |  |
Derecognition of debt, net after tax (in dollars per share) |  |  |  | $ 0.11 |  |  |
Notes Payable [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Aggregate amount of notes payable |  |  |  | $ 1,000,000 |  |  |
Aggregate principal payment due in 2019 |  |  |  | 600,000 |  |  |
Aggregate principal payment due in 2020 |  |  |  | $ 400,000 |  |  |
Minimum [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Spread on Libor variable rate |  |  |  | 1.25% |  |  |
Spread on variable rate |  |  |  | 0.10% |  |  |
Percentage of unused commitment fee |  |  |  | 0.25% |  |  |
Minimum [Member] | Notes Payable [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Average effective interest rate |  |  |  | 4.50% |  |  |
Maximum [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Spread on Libor variable rate |  |  |  | 2.00% |  |  |
Spread on variable rate |  |  |  | 1.00% |  |  |
Percentage of unused commitment fee |  |  |  | 0.30% |  |  |
Maximum [Member] | Notes Payable [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Average effective interest rate |  |  |  | 5.00% |  |  |
Credit Facility [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Revolving credit facility commitment |  |  |  |  |  |  | $ 125,000,000
Revolving credit facility maturity date |  |  |  | Nov. 30, 2021 |  |  |
Remaining revolving credit outstanding |  |  |  | $ 87,000,000 |  |  |
Average effective interest rate |  |  |  | 4.10% |  |  |
Credit Agreement [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Cash and noncash consideration with respect to acquisition after amendment |  |  | $ 50,000,000 |  |  |  |
Credit Agreement [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |  |
Cash dividends after amendment | $ 20,000,000 | $ 15,000,000 | $ 10,000,000 |  |  |  |

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