Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Company Financial Instruments (Detail) - USD ($) $ in Thousands |
Mar. 31, 2017 |
Mar. 31, 2016 |
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Derivatives assets, Carrying Amount | $ 1,163 | $ 0 |
| Derivatives liabilities, Carrying Amount | 313 | 1,487 |
| Derivatives assets, Fair Value | 1,163 | 0 |
| Derivatives liabilities, Fair Value | 313 | 1,487 |
| Reported Value Measurement [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Notes Payable, Fair Value Disclosure | 300,000 | 300,000 |
| Estimate of Fair Value Measurement [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Notes Payable, Fair Value Disclosure | $ 303,000 | $ 288,000 |