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Unconsolidated Joint Venture - (Detail) € in Thousands, $ in Thousands | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 28, 2015 USD ($) | Feb. 28, 2015 EUR (€) | Sep. 30, 2014 USD ($) | Sep. 30, 2014 EUR (€) | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Feb. 28, 2015 EUR (€) | Jan. 31, 2015 USD ($) | Jan. 31, 2015 EUR (€) | Sep. 30, 2014 EUR (€) | Sep. 30, 2013 USD ($) | Sep. 30, 2013 EUR (€)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Initial funding for equity method investment |  |  |  |  | $ 0 | $ 3,929 |  |  |  |  |  |
KBCD Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  |  |  |  |  |  |  | 21.00% | 21.00%
Initial funding for equity method investment |  |  | $ 39,477 | € 30,724 |  |  |  |  |  |  |  |
BKB Bank [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  |  |  | 11.00% |  |  |  |  |  |  |
Company and affiliated investors ownership, percentage |  |  |  |  | 100.00% |  |  |  |  |  |  |
Commitment to Invest in KBCD [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Commitment to invest |  |  | $ 50,000 |  |  |  |  |  |  | € 38,000 | $ 50,000 | € 38,000
Unfunded Commitment, Champ L.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Commitment to invest | $ 3,675 |  |  |  |  |  | € 3,229 |  |  |  |  |
Wholly-owned Subsidiary [Member] | Champ Limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  | 59.00% |  |  |  |  |  |  | 59.00% |  |
Champ LP [Member] | KBC Bank Deutschland AG [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest |  |  | 35.00% |  |  |  |  |  |  | 35.00% |  |
Company and affiliated investors ownership, percentage |  |  |  |  | 100.00% |  |  |  |  |  |  |
Champ LP [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Sale of equity method investment, percentage | 48.00% | 48.00% |  |  |  |  |  |  |  |  |  |
Proceeds from sale of equity method investments | $ 20,794 | € 16,314 |  |  |  |  |  |  |  |  |  |
Foreign exchange adjustments included in accumulated other comprehensive loss | $ 2,614 |  |  |  |  |  |  |  |  |  |  |
Champ LP [Member] | Additional Investment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Commitment to invest |  |  |  |  |  |  |  | $ 3,929 | € 3,331 |  |  |

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