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Stockholders' Equity (Details) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Dec. 31, 2015 USD ($) | Mar. 31, 2017 USD ($) transaction $ / shares | Mar. 31, 2016 USD ($) | Jun. 30, 2015 USD ($)
Class of Stock [Line Items] |  |  |  |
Up-front payment for common stock |  | $ 50,000,000 | $ 9,013,000 |
Common Class A [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Share repurchase program authorized amount |  |  |  | $ 150,000,000
ASR transaction accounted for as a treasury stock repurchase |  | $ 150,000,000 |  |
Accelerated Share Repurchase Agreement [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Stock repurchase program, number of transactions | transaction |  | 2 |  |
December 2015 Repurchase Plan [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Up-front payment for common stock | $ 10,000,000 |  |  |
Stock repurchased during period, value |  | $ 600,000 |  |
Stock repurchased during period, average cost per share (in USD per share) | $ / shares |  | $ 16.15 |  |

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