Fair Value Measurements - Schedule of Fair Value Measurement of Debt Instrument (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	$ 337,722	$ 239,251
Debt Instrument, Fair Value	339,231	241,574
Line of Credit
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	140,024	48,597
Debt Instrument, Fair Value	140,024	48,597
Non Bank Term Loans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt		3,138
Debt Instrument, Fair Value		3,853
Bank Term Loan
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	32,219	33,382
Debt Instrument, Fair Value	34,248	35,653
Notes Payable
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	31,346	29,563
Debt Instrument, Fair Value	30,827	28,900
Syndicated Term Loans
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	134,133	124,571
Debt Instrument, Fair Value	$ 134,133	$ 124,571