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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Feb. 28, 2017 | Jul. 31, 2015 | Feb. 28, 2015 | Feb. 28, 2014
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 0 | 0 |  |  |  |  |
Stock repurchased during period |  | $ 377 | $ 19,623 | $ 10,000 |  |  |  |
Number of shares available for future stock repurchase program (in shares) |  | 0 |  |  |  |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  | 500,000 |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  | $ 20 |  |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) |  | 30,000 |  |  |  |  |  |
Preferred stock, voting rights |  | Each share of the Series A Preferred Stock shall entitle the holder to one thousand votes |  |  |  |  |  |
Stock Repurchase Program 2014 [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  |  | $ 10,000
Stock repurchased during period (in shares) |  |  |  | 284,284 |  |  |  |
Stock repurchased during period |  |  |  | $ 10,000 |  |  |  |
Stock repurchase program, remaining authorized amount |  |  |  | $ 0 |  |  |  |
Stock Repurchase Program 2015 [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  | $ 10,000 | $ 10,000 |
Stock repurchased during period (in shares) | 10,135 |  | 551,791 |  |  |  |  |
Stock repurchased during period | $ 400 |  | $ 19,600 |  |  |  |  |
Stock repurchase program, remaining authorized amount |  | $ 400 |  |  |  |  |  |
Subsequent Event [Member] | Stock Repurchase Program 2017 [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 20,000 |  |  |

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