Shareholder Report, Average Annual Return (Details)	12 Months Ended	60 Months Ended	114 Months Ended	120 Months Ended
Shareholder Report, Average Annual Return (Details)	May 31, 2026	May 31, 2026	May 31, 2026	May 31, 2026
Without Sales Load [Member] \| C000141380
Average Annual Return [Line Items]
Average Annual Return, Percent	7.59%	4.93%		6.16%
Without Sales Load [Member] \| C000141381
Average Annual Return [Line Items]
Average Annual Return, Percent	7.48%	4.76%		6.01%
Without Sales Load [Member] \| C000177210
Average Annual Return [Line Items]
Average Annual Return, Percent	7.85%	5.19%	5.85%
Bloomberg U.S. Aggregate Bond Index
Average Annual Return [Line Items]
Average Annual Return, Percent	5.13%	0.17%		1.70%
Bloomberg U.S. Aggregate Bond Index
Average Annual Return [Line Items]
Average Annual Return, Percent	5.13%	0.17%		1.70%
Bloomberg U.S. Aggregate Bond Index
Average Annual Return [Line Items]
Average Annual Return, Percent	5.13%	0.17%	1.86%
Bloomberg U.S. High-Yield 2% Issuer Capped Bond Index
Average Annual Return [Line Items]
Average Annual Return, Percent	7.57%	4.39%		5.87%
Bloomberg U.S. High-Yield 2% Issuer Capped Bond Index
Average Annual Return [Line Items]
Average Annual Return, Percent	7.57%	4.39%		5.87%
Bloomberg U.S. High-Yield 2% Issuer Capped Bond Index
Average Annual Return [Line Items]
Average Annual Return, Percent	7.57%	4.39%	5.51%